Uncertainty and expectation are the joys of life. Security is an insipid thing, through the overtaking and possessing of a wish discovers the folly of the chase.
Maturity of mind is the capacity to endure uncertainty.
Uncertainty and mystery are energies of life. Don't let them scare you unduly, for they keep boredom at bay and spark creativity.
Knowledge is an unending adventure at the edge of uncertainty.
We demand guaranteed rigidly defined areas of doubt and uncertainty.
There is no such uncertainty as a sure thing.
It is a dream, sweet child! a waking dream, A blissful certainty, a vision bright, Of that rare happiness, which even on earth Heaven gives to those it loves.