It is uncertainty which fills life with beauty, excitement, and joy.

The fastest way to break the cycle of perfectionism and become a fearless mother is to give up the idea of doing it perfectly - indeed to embrace uncertainty and imperfection.

Although our intellect always longs for clarity and certainty, our nature often finds uncertainty fascinating.

Knowledge is an unending adventure at the edge of uncertainty.

There is no such uncertainty as a sure thing.

Truth is confirmed by inspection and delay; falsehood by haste and uncertainty.

If you aren't in the moment, you are either looking forward to uncertainty, or back to pain and regret.

The only thing that makes life possible is permanent, intolerable uncertainty, not knowing what comes next.

Unrest and uncertainty are our lot.

Our doubts are traitors And make us lose the good we oft might win By fearing to attempt.

We sail within a vast sphere, ever drifting in uncertainty, driven from end to end.

It is infinitely safer to know that the man at the top has his doubts, as you and I have ours, yet has the courage to move ahead in spite of these doubts.

Doubt and mistrust are the mere panic of timid imagination, which the steadfast heart will conquer, and the large mind transcend.

The quest for certainty blocks the search for meaning. Uncertainty is the very condition to impel man to unfold his powers.

Oft from new truths, and new phrase, new doubts grow, As strange attire aliens the men we know.

Diffidence is the better part of knowledge.

We are not certain, we are never certain. If we were, we could reach some conclusions, and we could, at last, make others take us seriously.

Doubt of the reality of love ends by making us doubt everything.

The appalling uncertainty of man's existence is haltingly underscored by the momentous certainty of the phenomenon of death.

All uncertainty is fruitful ... so long as it is accompanied by the wish to understand.