INTRODUCTION

A Treatise Concerning the Principles of Human Knowledge

by George Berkeley

INTRODUCTION, A TREATISE CONCERNING THE PRINCIPLES OF HUMAN KNOWLEDGE by George Berkeley



1. Philosophy being nothing else but THE STUDY OF WISDOM AND TRUTH, it
may with reason be expected that those who have spent most time and pains
in it should enjoy a greater calm and serenity of mind, a greater
clearness and evidence of knowledge, and be less disturbed with doubts
and difficulties than other men. Yet so it is, we see the illiterate bulk
of mankind that walk the high-road of plain common sense, and are
governed by the dictates of nature, for the most part easy and
undisturbed. To them nothing THAT IS FAMILIAR appears unaccountable or
difficult to comprehend. They complain not of any want of evidence in
their senses, and are out of all danger of becoming SCEPTICS. But no
sooner do we depart from sense and instinct to follow the light of a
superior principle, to reason, meditate, and reflect on the nature of
things, but a thousand scruples spring up in our minds concerning those
things which before we seemed fully to comprehend. Prejudices and errors
of sense do from all parts discover themselves to our view; and,
endeavouring to correct these by reason, we are insensibly drawn into
uncouth paradoxes, difficulties, and inconsistencies, which multiply and
grow upon us as we advance in speculation, till at length, having
wandered through many intricate mazes, we find ourselves just where we
were, or, which is worse, sit down in a forlorn Scepticism.

2. The cause of this is thought to be the obscurity of things, or the
natural weakness and imperfection of our understandings. It is said, the
faculties we have are few, and those designed by nature for the SUPPORT
and comfort of life, and not to penetrate into the INWARD ESSENCE and
constitution of things. Besides, the mind of man being finite, when it
treats of things which partake of infinity, it is not to be wondered at
if it run into absurdities and contradictions, out of which it is
impossible it should ever extricate itself, it being of the nature of
infinite not to be comprehended by that which is finite.

3. But, perhaps, we may be too partial to ourselves in placing the fault
originally in our faculties, and not rather in the wrong use we make of
them. IT IS A HARD THING TO SUPPOSE THAT RIGHT DEDUCTIONS FROM TRUE
PRINCIPLES SHOULD EVER END IN CONSEQUENCES WHICH CANNOT BE MAINTAINED or
made consistent. We should believe that God has dealt more bountifully
with the sons of men than to give them a strong desire for that knowledge
which he had placed quite out of their reach. This were not agreeable to
the wonted indulgent methods of Providence, which, whatever appetites it
may have implanted in the creatures, doth usually furnish them with such
means as, if rightly made use of, will not fail to satisfy them. Upon the
whole, I am inclined to think that the far greater part, if not all, of
those difficulties which have hitherto amused philosophers, and blocked
up the way to knowledge, are entirely owing to ourselves--that we have
first raised a dust and then complain we cannot see.

4. My purpose therefore is, to try if I can discover what those
Principles are which have introduced all that doubtfulness and
uncertainty, those absurdities and contradictions, into the several sects
of philosophy; insomuch that the wisest men have thought our ignorance
incurable, conceiving it to arise from the natural dulness and limitation
of our faculties. And surely it is a work well deserving our pains to
make a strict inquiry concerning the First Principles of Human Knowledge,
to sift and examine them on all sides, especially since there may be some
grounds to suspect that those lets and difficulties, which stay and
embarrass the mind in its search after truth, do not spring from any
darkness and intricacy in the objects, or natural defect in the
understanding, so much as from false Principles which have been insisted
on, and might have been avoided.

5. How difficult and discouraging soever this attempt may seem, when I
consider how many great and extraordinary men have gone before me in the
like designs, yet I am not without some hopes--upon the consideration
that the largest views are not always the clearest, and that he who is
short--sighted will be obliged to draw the object nearer, and may,
perhaps, by a close and narrow survey, discern that which had escaped far
better eyes.

6. A CHIEF SOURCE OF ERROR IN ALL PARTS OF KNOWLEDGE.--In order to
prepare the mind of the reader for the easier conceiving what
follows, it is proper to premise somewhat, by way of Introduction,
concerning the nature and abuse of Language. But the unravelling this
matter leads me in some measure to anticipate my design, by taking notice
of what seems to have had a chief part in rendering speculation intricate
and perplexed, and to have occasioned innumerable errors and difficulties
in almost all parts of knowledge. And that is the opinion that the mind
has a power of framing ABSTRACT IDEAS or notions of things. He who is
not a perfect stranger to the writings and disputes of philosophers must
needs acknowledge that no small part of them are spent about abstract
ideas. These are in a more especial manner thought to be the object of
those sciences which go by the name of LOGIC and METAPHYSICS, and of all
that which passes under the notion of the most abstracted and sublime
learning, in all which one shall scarce find any question handled in such
a manner as does not suppose their existence in the mind, and that it is
well acquainted with them.

7. PROPER ACCEPTATION OF ABSTRACTION.--It is agreed on all hands that the
qualities or modes of things do never REALLY EXIST EACH OF THEM APART BY
ITSELF, and separated from all others, but are mixed, as it were, and
blended together, several in the same object. But, we are told, the mind
being able to consider each quality singly, or abstracted from those other
qualities with which it is united, does by that means frame to itself
abstract ideas. For example, there is perceived by sight an object
extended, coloured, and moved: this mixed or compound idea the mind
resolving into its simple, constituent parts, and viewing each by itself,
exclusive of the rest, does frame the abstract ideas of extension, colour,
and motion. Not that it is possible for colour or motion to exist without
extension; but only that the mind can frame to itself by ABSTRACTION the
idea of colour exclusive of extension, and of motion exclusive of both
colour and extension.

8. OF GENERALIZING [Note].--Again, the mind having observed that in the
particular extensions perceived by sense there is something COMMON and
alike IN ALL, and some other things peculiar, as this or that figure or
magnitude, which distinguish them one from another; it considers apart or
singles out by itself that which is common, making thereof a most abstract
idea of extension, which is neither line, surface, nor solid, nor has any
figure or magnitude, but is an idea entirely prescinded from all these. So
likewise the mind, by leaving out of the particular colours perceived by
sense that which distinguishes them one from another, and retaining that
only which is COMMON TO ALL, makes an idea of colour in abstract which is
neither red, nor blue, nor white, nor any other determinate colour. And,
in like manner, by considering motion abstractedly not only from the body
moved, but likewise from the figure it describes, and all particular
directions and velocities, the abstract idea of motion is framed; which
equally corresponds to all particular motions whatsoever that may be
perceived by sense.

[Note: Vide Reid, on the Intellectual Powers of Man, Essay V,
chap iii. sec. 1, edit. 1843]

9. OF COMPOUNDING.--And as the mind frames to itself abstract ideas of
qualities or MODES, so does it, by the same precision or mental
separation, attain abstract ideas of the more compounded BEINGS
which include several coexistent qualities. For example, the mind
having observed that Peter, James, and John resemble each other
in certain common agreements of shape and other qualities, leaves
out of the complex or compounded idea it has of Peter, James, and
any other particular man, that which is peculiar to each, retaining
only what is common to all, and so makes an abstract idea wherein
all the particulars equally partake--abstracting entirely from
and cutting off all those circumstances and differences which might
determine it to any particular existence. And after this manner it is
said we come by the abstract idea of MAN, or, if you please, humanity, or
human nature; wherein it is true there is included colour, because there
is no man but has some colour, but then it can be neither white, nor
black, nor any particular colour, because there is no one particular
colour wherein all men partake. So likewise there is included stature,
but then it is neither tall stature, nor low stature, nor yet middle
stature, but something abstracted from all these. And so of the rest.
Moreover, their being a great variety of other creatures that partake in
some parts, but not all, of the complex idea of MAN, the mind, leaving
out those parts which are peculiar to men, and retaining those only which
are common to all the living creatures, frames the idea of ANIMAL, which
abstracts not only from all particular men, but also all birds, beasts,
fishes, and insects. The constituent parts of the abstract idea of animal
are body, life, sense, and spontaneous motion. By BODY is meant body
without any particular shape or figure, there being no one shape or
figure common to all animals, without covering, either of hair, or
feathers, or scales, &c., nor yet naked: hair, feathers, scales, and
nakedness being the distinguishing properties of particular animals, and
for that reason left out of the ABSTRACT IDEA. Upon the same account the
spontaneous motion must be neither walking, nor flying, nor creeping; it
is nevertheless a motion, but what that motion is it is not easy to
conceive[Note.]. [Note: Vide Hobbes' Tripos, ch. v. sect. 6.]

10. TWO OBJECTIONS TO THE EXISTENCE OF ABSTRACT IDEAS.--Whether
others have this wonderful faculty of ABSTRACTING THEIR IDEAS,
they best can tell: for myself, I find indeed I have a faculty of
imagining, or representing to myself, the ideas of those particular
things I have perceived, and of variously compounding and dividing them.
I can imagine a man with two heads, or the upper parts of a man joined to
the body of a horse. I can consider the hand, the eye, the nose, each by
itself abstracted or separated from the rest of the body. But then
whatever hand or eye I imagine, it must have some particular shape and
colour. Likewise the idea of man that I frame to myself must be either of
a white, or a black, or a tawny, a straight, or a crooked, a tall, or a
low, or a middle-sized man. I cannot by any effort of thought conceive
the abstract idea above described. And it is equally impossible for me to
form the abstract idea of motion distinct from the body moving, and which
is neither swift nor slow, curvilinear nor rectilinear; and the like may
be said of all other abstract general ideas whatsoever. To be plain, I
own myself able to abstract IN ONE SENSE, as when I consider some
particular parts or qualities separated from others, with which, though
they are united in some object, yet it is possible they may really exist
without them. But I deny that I can abstract from one another, or
conceive separately, those qualities which it is impossible should exist
so separated; or that I can frame a general notion, by abstracting from
particulars in the manner aforesaid--which last are the two proper
acceptations of ABSTRACTION. And there are grounds to think most men will
acknowledge themselves to be in my case. The generality of men which are
simple and illiterate never pretend to ABSTRACT NOTIONS. It is said
they are difficult and not to be attained without pains and study; we may
therefore reasonably conclude that, if such there be, they are confined
only to the learned.

11. I proceed to examine what can be alleged in DEFENCE OF THE DOCTRINE
OF ABSTRACTION, and try if I can discover what it is that inclines the
men of speculation to embrace an opinion so remote from common sense as
that seems to be. There has been a late deservedly esteemed philosopher
who, no doubt, has given it very much countenance, by seeming to think
the having abstract general ideas is what puts the widest difference in
point of understanding betwixt man and beast. "The having of general
ideas," saith he, "is that which puts a perfect distinction betwixt man
and brutes, and is an excellency which the faculties of brutes do by no
means attain unto. For, it is evident we observe no foot-steps in them of
making use of general signs for universal ideas; from which we have
reason to imagine that they have not the FACULTY OF ABSTRACTING, or
making general ideas, since they have no use of words or any other
general signs." And a little after: "Therefore, I think, we may suppose
that it is in this that the species of brutes are discriminated from men,
and it is that proper difference wherein they are wholly separated, and
which at last widens to so wide a distance. For, if they have any ideas
at all, and are not bare machines (as some would have them), we cannot
deny them to have some reason. It seems as evident to me that they do,
some of them, in certain instances reason as that they have sense; but it
is only in particular ideas, just as they receive them from their senses.
They are the best of them tied up within those narrow bounds, and have
not (as I think) the faculty to enlarge them by any kind of
ABSTRACTION." Essay on Human Understanding, II. xi. 10 and 11. I readily
agree with this learned author, that the faculties of brutes can by no
means attain to ABSTRACTION. But then if this be made the distinguishing
property of that sort of animals, I fear a great many of those that pass
for men must be reckoned into their number. The reason that is here
assigned why we have no grounds to think brutes have abstract general
ideas is, that we observe in them no use of words or any other general
signs; which is built on this supposition--that the making use of words
implies the having general ideas. From which it follows that men who use
language are able to ABSTRACT or GENERALIZE their ideas. That this is the
sense and arguing of the author will further appear by his answering the
question he in another place puts: "Since all things that exist are only
particulars, how come we by general terms?" His answer is: "Words become
general by being made the signs of general ideas."--Essay on Human
Understanding, IV. iii. 6. But [Note. 1] it seems that a word becomes
general by being made the sign, not of an ABSTRACT general idea, but of
several particular ideas [Note. 2], any one of which it indifferently
suggests to the mind. For example, when it is said "the change of motion
is proportional to the impressed force," or that "whatever has extension
is divisible," these propositions are to be understood of motion
and extension in general; and nevertheless it will not follow that
they suggest to my thoughts an idea of motion without a body moved,
or any determinate direction and velocity, or that I must conceive
an abstract general idea of extension, which is neither line, surface,
nor solid, neither great nor small, black, white, nor red, nor of any
other determinate colour. It is only implied that whatever particular
motion I consider, whether it be swift or slow, perpendicular,
horizontal, or oblique, or in whatever object, the axiom concerning
it holds equally true. As does the other of every particular extension,
it matters not whether line, surface, or solid, whether of this or
that magnitude or figure.

[Note 1: "TO THIS I CANNOT ASSENT, BEING OF OPINION," edit of 1710.]
[Note 2: Of the same sort.]

12. EXISTENCE OF GENERAL IDEAS ADMITTED.--By observing how ideas
become general we may the better judge how words are made so.
And here it is to be noted that I do not deny absolutely there
are general ideas, but only that there are any ABSTRACT GENERAL
IDEAS; for, in the passages we have quoted wherein there is
mention of general ideas, it is always supposed that they are formed by
ABSTRACTION, after the manner set forth in sections 8 and 9. Now, if we
will annex a meaning to our words, and speak only of what we can
conceive, I believe we shall acknowledge that an idea which, considered
in itself, is particular, becomes general by being made to represent or
stand for all other particular ideas of the SAME SORT. To make this plain
by an example, suppose a geometrician is demonstrating the method of
cutting a line in two equal parts. He draws, for instance, a black line
of an inch in length: this, which in itself is a particular line, is
nevertheless with regard to its signification general, since, as it is
there used, it represents all particular lines whatsoever; so that what
is demonstrated of it is demonstrated of all lines, or, in other words,
of a line in general. And, as that particular line becomes general by
being made a sign, so the name LINE, which taken absolutely is
PARTICULAR, by being a sign is made GENERAL. And as the former owes its
generality not to its being the sign of an abstract or general line, but
of ALL PARTICULAR right lines that may possibly exist, so the latter must
be thought to derive its generality from the same cause, namely, the
VARIOUS PARTICULAR lines which it indifferently denotes. [Note.]

[Note: "I look upon this (doctrine) to be one of the greatest and most
valuable discoveries that have been made of late years in the republic
of letters."--Treatise of Human Nature, book i, part i, sect. 7. Also
Stewart's Philosophy of the Mind, part i, chapt. iv. sect. iii. p. 99.]

13. ABSTRACT GENERAL IDEAS NECESSARY, ACCORDING TO LOCKE.--To give
the reader a yet clearer view of the nature of abstract ideas,
and the uses they are thought necessary to, I shall add one more
passage out of the Essay on Human Understanding, (IV. vii. 9) which is as
follows: "ABSTRACT IDEAS are not so obvious or easy to children or the
yet unexercised mind as particular ones. If they seem so to grown men it
is only because by constant and familiar use they are made so. For, when
we nicely reflect upon them, we shall find that general ideas are
fictions and contrivances of the mind, that carry difficulty with them,
and do not so easily offer themselves as we are apt to imagine. For
example, does it not require some pains and skill to form the general
idea of a triangle (which is yet none of the most abstract,
comprehensive, and difficult); for it must be neither oblique nor
rectangle, neither equilateral, equicrural, nor scalenon, but ALL AND
NONE of these at once? In effect, it is something imperfect that cannot
exist, an idea wherein some parts of several different and INCONSISTENT
ideas are put together. It is true the mind in this imperfect state has
need of such ideas, and makes all the haste to them it can, for the
CONVENIENCY OF COMMUNICATION AND ENLARGEMENT OF KNOWLEDGE, to both which
it is naturally very much inclined. But yet one has reason to suspect
such ideas are marks of our imperfection. At least this is enough to show
that the most abstract and general ideas are not those that the mind is
first and most easily acquainted with, nor such as its earliest knowledge
is conversant about."--If any man has the faculty of framing in his mind
such an idea of a triangle as is here described, it is in vain to pretend
to dispute him out of it, nor would I go about it. All I desire is that
the reader would fully and certainly inform himself whether he has such
an idea or no. And this, methinks, can be no hard task for anyone to
perform. What more easy than for anyone to look a little into his own
thoughts, and there try whether he has, or can attain to have, an idea
that shall correspond with the description that is here given of the
general idea of a triangle, which is NEITHER OBLIQUE NOR RECTANGLE,
EQUILATERAL, EQUICRURAL NOR SCALENON, BUT ALL AND NONE OF THESE AT ONCE?

14. BUT THEY ARE NOT NECESSARY FOR COMMUNICATIOPN.--Much is here
said of the difficulty that abstract ideas carry with them, and
the pains and skill requisite to the forming them. And it is on
all hands agreed that there is need of great toil and labour of the mind,
to emancipate our thoughts from particular objects, and raise them to
those sublime speculations that are conversant about abstract ideas. From
all which the natural consequence should seem to be, that so DIFFICULT a
thing as the forming abstract ideas was not necessary for COMMUNICATION,
which is so EASY and familiar to ALL SORTS OF MEN. But, we are told, if
they seem obvious and easy to grown men, IT IS ONLY BECAUSE BY CONSTANT
AND FAMILIAR USE THEY ARE MADE SO. Now, I would fain know at what time it
is men are employed in surmounting that difficulty, and furnishing
themselves with those necessary helps for discourse. It cannot be when
they are grown up, for then it seems they are not conscious of any such
painstaking; it remains therefore to be the business of their childhood.
And surely the great and multiplied labour of framing abstract notions
will be found a hard task for that tender age. Is it not a hard thing to
imagine that a couple of children cannot prate together of their
sugar-plums and rattles and the rest of their little trinkets, till they
have first tacked together numberless inconsistencies, and so framed in
their minds ABSTRACT GENERAL IDEAS, and annexed them to every common name
they make use of?

15. NOR FOR THE ENLARGEMENT OF KNOWLEDGE.--Nor do I think them
a whit more needful for the ENLARGEMENT OF KNOWLEDGE than for
COMMUNICATION. It is, I know, a point much insisted on, that
all knowledge and demonstration are about universal notions, to
which I fully agree: but then it doth not appear to me that those notions
are formed by ABSTRACTION in the manner PREMISED--UNIVERSALITY, so far as
I can comprehend, not consisting in the absolute, POSITIVE nature or
conception of anything, but in the RELATION it bears to the particulars
signified or represented by it; by virtue whereof it is that things,
names, or notions, being in their own nature PARTICULAR, are rendered
UNIVERSAL. Thus, when I demonstrate any proposition concerning triangles,
it is to be supposed that I have in view the universal idea of a
triangle; which ought not to be understood as if I could frame an idea of
a triangle which was neither equilateral, nor scalenon, nor equicrural;
but only that the particular triangle I consider, whether of this or that
sort it matters not, doth equally stand for and represent all rectilinear
triangles whatsoever, and is in that sense UNIVERSAL. All which seems
very plain and not to include any difficulty in it.

16. OBJECTION.--ANSWER.--But here it will be demanded, HOW WE CAN KNOW ANY
PROPOSITION TO BE TRUE OF ALL PARTICULAR TRIANGLES, EXCEPT we have first
seen it DEMONSTRATED OF THE ABSTRACT IDEA OF A TRIANGLE which equally
agrees to all? For, because a property may be demonstrated to agree to
some one particular triangle, it will not thence follow that it equally
belongs to any other triangle, which in all respects is not the same with
it. For example, having demonstrated that the three angles of an isosceles
rectangular triangle are equal to two right ones, I cannot therefore
conclude this affection agrees to all other triangles which have neither
a right angle nor two equal sides. It seems therefore that, to be certain
this proposition is universally true, we must either make a particular
demonstration for every particular triangle, which is impossible, or once
for all demonstrate it of the ABSTRACT IDEA OF A TRIANGLE, in which all
the particulars do indifferently partake and by which they are all
equally represented. To which I answer, that, though the idea I have in
view whilst I make the demonstration be, for instance, that of an
isosceles rectangular triangle whose sides are of a determinate length, I
may nevertheless be certain it extends to all other rectilinear
triangles, of what sort or bigness soever. And that because neither the
right angle, nor the equality, nor determinate length of the sides are at
all concerned in the demonstration. It is true the diagram I have in view
includes all these particulars, but then there is not the least mention
made of them in the proof of the proposition. It is not said the three
angles are equal to two right ones, because one of them is a right angle,
or because the sides comprehending it are of the same length. Which
sufficiently shows that the right angle might have been oblique, and the
sides unequal, and for all that the demonstration have held good. And for
this reason it is that I conclude that to be true of any obliquangular or
scalenon which I had demonstrated of a particular right--angled
equicrural triangle, and not because I demonstrated the proposition of
the abstract idea of a triangle And here it must be acknowledged that a
man may consider a figure merely as triangular, without attending to the
particular qualities of the angles, or relations of the sides. So far he
may abstract; but this will never prove that he can frame an abstract,
general, inconsistent idea of a triangle. In like manner we may consider
Peter so far forth as man, or so far forth as animal without framing the
fore-mentioned abstract idea, either of man or of animal, inasmuch as all
that is perceived is not considered.

17. ADVANTAGE OF INVESTIGATING THE DOCTRINE OF ABSTRACT GENERAL IDEAS.--
It were an endless as well as an useless thing to trace the
SCHOOLMEN, those great masters of abstraction, through all the manifold
inextricable labyrinths of error and dispute which their doctrine of
abstract natures and notions seems to have led them into. What bickerings
and controversies, and what a learned dust have been raised about those
matters, and what mighty advantage has been from thence derived to
mankind, are things at this day too clearly known to need being insisted
on. And it had been well if the ill effects of that doctrine were
confined to those only who make the most avowed profession of it. When
men consider the great pains, industry, and parts that have for so many
ages been laid out on the cultivation and advancement of the sciences,
and that notwithstanding all this the far greater part of them remains
full of darkness and uncertainty, and disputes that are like never to
have an end, and even those that are thought to be supported by the most
clear and cogent demonstrations contain in them paradoxes which are
perfectly irreconcilable to the understandings of men, and that, taking
all together, a very small portion of them does supply any real benefit
to mankind, otherwise than by being an innocent diversion and
amusement--I say the consideration of all this is apt to throw them into
a despondency and perfect contempt of all study. But this may perhaps
cease upon a view of the false principles that have obtained in the
world, amongst all which there is none, methinks, has a more wide and
extended sway over the thoughts of speculative men than [Note.] this of
abstract general ideas.

[Note: "That we have been endeavouring to overthrow."--Edit 1710.]

18. I come now to consider the SOURCE OF THIS PREVAILING NOTION, and that
seems to me to be LANGUAGE. And surely nothing of less extent than reason
itself could have been the source of an opinion so universally received.
The truth of this appears as from other reasons so also from the plain
confession of the ablest patrons of abstract ideas, who acknowledge that
they are made in order to naming; from which it is a clear consequence
that if there had been no such things as speech or universal signs there
never had been any thought of abstraction. See III. vi. 39, and elsewhere
of the Essay on Human Understanding. Let us examine the manner wherein
words have contributed to the origin of that mistake.--First
[Vide sect. xix.] then, it is thought that every name has, or
ought to have, ONE ONLY precise and settled signification, which
inclines men to think there are certain ABSTRACT, DETERMINATE IDEAS
that constitute the true and only immediate signification of each
general name; and that it is by the mediation of these abstract
ideas that a general name comes to signify any particular thing.
Whereas, in truth, there is no such thing as one precise and definite
signification annexed to any general name, they all signifying
indifferently a great number of particular ideas. All which doth
evidently follow from what has been already said, and will clearly appear
to anyone by a little reflexion. To this it will be OBJECTED that every
name that has a definition is thereby restrained to one certain
signification. For example, a TRIANGLE is defined to be A PLAIN SURFACE
COMPREHENDED BY THREE RIGHT LINES, by which that name is limited to
denote one certain idea and no other. To which I answer, that in the
definition it is not said whether the surface be great or small, black or
white, nor whether the sides are long or short, equal or unequal, nor
with what angles they are inclined to each other; in all which there may
be great variety, and consequently there is NO ONE SETTLED IDEA which
limits the signification of the word TRIANGLE. It is one thing for to
keep a name constantly to the same definition, and another to make it
stand everywhere for the same idea; the one is necessary, the other
useless and impracticable.

19. SECONDLY, But, to give a farther account how WORDS came to PRODUCE THE
DOCTRINE OF ABSTRACT IDEAS, it must be observed that it is a received
opinion that language has NO OTHER END but the communicating our ideas,
and that every significant name stands for an idea. This being so, and it
being withal certain that names which yet are not thought altogether
insignificant do not always mark out PARTICULAR conceivable ideas, it is
straightway concluded that THEY STAND FOR ABSTRACT NOTIONS. That there are
many names in use amongst speculative men which do not always suggest to
others determinate, particular ideas, or in truth anything at all, is what
nobody will deny. And a little attention will discover that it is not
necessary (even in the strictest reasonings) significant names which
stand for ideas should, every time they are used, excite in the
understanding the ideas they are made to stand for--in reading and
discoursing, names being for the most part used as letters are in
ALGEBRA, in which, though a particular quantity be marked by each letter,
yet to proceed right it is not requisite that in every step each letter
suggest to your thoughts that particular quantity it was appointed to
stand for.[Note.]

[Note: Language has become the source or origin of abstract general ideas
on account of a twofold error.--(1.) That every word has only one
signification. (2.) That the only end of language is the communication
of our ideas--Ed.]

20. SOME OF THE ENDS OF LANGUAGE.--Besides, the communicating of ideas
marked by words is not the chief and only end of language, as is
commonly supposed. There are other ends, as the raising of some
passion, the exciting to or deterring from an action, the putting
the mind in some particular disposition--to which the former is
in many cases barely subservient, and sometimes entirely omitted,
when these can be obtained without it, as I think does not unfrequently
happen in the familiar use of language. I entreat the reader to
reflect with himself, and see if it doth not often happen, either in
hearing or reading a discourse, that the passions of fear, love, hatred,
admiration, disdain, and the like, arise immediately in his mind upon the
perception of certain words, without any ideas coming between. At first,
indeed, the words might have occasioned ideas that were fitting to
produce those emotions; but, if I mistake not, it will be found that,
when language is once grown familiar, the hearing of the sounds or sight
of the characters is oft immediately attended with those passions which
at first were wont to be produced by the intervention of ideas that are
now quite omitted. May we not, for example, be affected with the promise
of a GOOD THING, though we have not an idea of what it is? Or is not the
being threatened with danger sufficient to excite a dread, though we
think not of any particular evil likely to befal us, nor yet frame to
ourselves an idea of danger in abstract? If any one shall join ever so
little reflexion of his own to what has been said, I believe that it will
evidently appear to him that general names are often used in the
propriety of language without the speaker's designing them for marks of
ideas in his own, which he would have them raise in the mind of the
hearer. Even proper names themselves do not seem always spoken with a
design to bring into our view the ideas of those individuals that are
supposed to be marked by them. For example, when a schoolman tells me
"Aristotle has said it," all I conceive he means by it is to dispose me
to embrace his opinion with the deference and submission which custom has
annexed to that name. And this effect is often so instantly produced in
the minds of those who are accustomed to resign their judgment to
authority of that philosopher, as it is impossible any idea either of his
person, writings, or reputation should go before [Note.]. Innumerable
examples of this kind may be given, but why should I insist on those
things which every one's experience will, I doubt not, plentifully
suggest unto him?

[Note: "So close and immediate a connection may custom establish betwixt
the very word ARISTOTLE, and the motions of assent and reverence
in the minds of some men."--Edit 1710.]

21. CAUTION IN THE USE OF LANGUAGE NECESSARY.--We have, I think,
shown the impossibility of ABSTRACT IDEAS. We have considered
what has been said for them by their ablest patrons; and endeavored
to show they are of no use for those ends to which they are thought
necessary. And lastly, we have traced them to the source from
whence they flow, which appears evidently to be language.--It cannot be
denied that words are of excellent use, in that by their means all that
stock of knowledge which has been purchased by the joint labours of
inquisitive men in all ages and nations may be drawn into the view and
made the possession of one single person. But at the same time it must be
owned that most parts of knowledge have been strangely perplexed and
darkened by the abuse of words, and general ways of speech wherein they
are delivered.[Note 1.] Since therefore words are so apt to impose on the
understanding[Note 2.], whatever ideas I consider, I shall endeavour to
take them bare and naked into my view, keeping out of my thoughts so far
as I am able, those names which long and constant use has so strictly
united with them; from which I may expect to derive the following
advantages:

[Note 1: "That it may almost be made a question, whether language
has contributed more to the hindrance or advancement of the
sciences."--Edit 1710.]
[Note 2: "I am resolved in my inquiries to make as little use of them
as possibly I can."--Edit 1710.]

22. FIRST, I shall be sure to get clear of all controversies PURELY
VERBAL--the springing up of which weeds in almost all the sciences has
been a main hindrance to the growth of true and sound knowledge.
SECONDLY, this seems to be a sure way to extricate myself out of that
fine and subtle net of ABSTRACT IDEAS which has so miserably perplexed
and entangled the minds of men; and that with this peculiar circumstance,
that by how much the finer and more curious was the wit of any man, by so
much the deeper was he likely to be ensnared and faster held therein.
THIRDLY, so long as I confine my thoughts to my own ideas divested of
words, I do not see how I can easily be mistaken. The objects I consider,
I clearly and adequately know. I cannot be deceived in thinking I have an
idea which I have not. It is not possible for me to imagine that any of
my own ideas are alike or unlike that are not truly so. To discern the
agreements or disagreements there are between my ideas, to see what ideas
are included in any compound idea and what not, there is nothing more
requisite than an attentive perception of what passes in my own
understanding.

23. But the attainment of all THESE ADVANTAGES doth PRESUPPOSE AN ENTIRE
DELIVERANCE FROM THE DECEPTION OF WORDS, which I dare hardly promise
myself; so difficult a thing it is to dissolve an union so early begun,
and confirmed by so long a habit as that betwixt words and ideas. Which
difficulty seems to have been very much increased by the doctrine of
ABSTRACTION. For, so long as men thought abstract ideas were annexed to
their words, it doth not seem strange that they should use words for
ideas--it being found an impracticable thing to lay aside the word, and
RETAIN THE ABSTRACT IDEA IN THE MIND, WHICH IN ITSELF WAS PERFECTLY
INCONCEIVABLE. This seems to me the principal cause why those men who
have so emphatically recommended to others the laying aside all use of
words in their meditations, and contemplating their bare ideas, have yet
failed to perform it themselves. Of late many have been very sensible of
the absurd opinions and insignificant disputes which grow out of the
abuse of words. And, in order to remedy these evils, they advise well,
that we attend to the ideas signified, and draw off our attention from
the words which signify them. But, how good soever this advice may be
they have given others, it is plain they could not have a due regard to
it themselves, so long as they thought the only immediate use of words
was to signify ideas, and that the immediate signification of every
general name was a DETERMINATE ABSTRACT IDEA.

24. But, THESE BEING KNOWN TO BE MISTAKES, A MAN MAY with greater ease
PREVENT HIS BEING IMPOSED ON BY WORDS. He that knows he has no other than
particular ideas, will not puzzle himself in vain to find out and
conceive the abstract idea annexed to any name. And he that knows names
do not always stand for ideas will spare himself the labour of looking
for ideas where there are none to be had. It were, therefore, to be
wished that everyone would use his utmost endeavours to obtain a clear
view of the ideas he would consider, separating from them all that dress
and incumbrance of words which so much contribute to blind the judgment
and divide the attention. In vain do we extend our view into the heavens
and pry into the entrails of the earth, in vain do we consult the
writings of learned men and trace the dark footsteps of antiquity--we
need only draw the curtain of words, to hold the fairest tree of
knowledge, whose fruit is excellent, and within the reach of our hand.

25. Unless we take care TO CLEAR THE FIRST PRINCIPLES OF KNOWLEDGE FROM
THE embarras and DELUSION OF WORDS, we may make infinite reasonings upon
them to no purpose; we may draw consequences from consequences, and be
never the wiser. The farther we go, we shall only lose ourselves the more
irrecoverably, and be the deeper entangled in difficulties and mistakes.
Whoever therefore designs to read the following sheets, I entreat him to
make my words the occasion of his own thinking, and endeavour to attain
the same train of thoughts in reading that I had in writing them. By this
means it will be easy for him to discover the truth or falsity of what I
say. He will be out of all danger of being deceived by my words, and I do
not see how he can be led into an error by considering his own naked,
undisguised ideas.