Uncertainty also relieves us of our judgment of ourselves. Then we don’t know if we’re lovable or not; we don’t know how attractive we are; we don’t know how successful we could potentially become. The only way to achieve these things is to remain uncertain of them and be open to finding them out through experience. Uncertainty is the root of all progress and all growth. As the old adage goes, the man who believes he knows everything learns nothing. We cannot learn anything without first not knowing something.

Uncertainty removes our judgments of others; it preempts the unnecessary stereotyping and biases that we otherwise feel when we see somebody on TV, in the office, or on the street. Uncertainty also relieves us of our judgment of ourselves. We don’t know if we’re lovable or not; we don’t know how attractive we are; we don’t know how successful we could potentially become. The only way to achieve these things is to remain uncertain of them and be open to finding them out through experience.

Without new ideas success can become stale.

If .. spontaneous optimism falters, leaving us to depend on nothing but a mathematical expectation, enterprise will fade and die.

Uncertainty is an uncomfortable position. But certainty is an absurd one.

An unbiased appreciation of uncertainty is a cornerstone of rationality — but it is not what people and organizations want. Extreme uncertainty is paralyzing under dangerous circumstances, and the admission that one is merely guessing is especially unacceptable when the stakes are high. Acting on pretended knowledge is often the preferred solution.

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

Ceaseless change is an unreliable basis for lasting fulfillment.

Uncertainty is the root of all progress and all growth. As the old adage goes, the man who believes he knows everything learns nothing. We cannot learn anything without first not knowing something. The more we admit we do not know, the more opportunities we gain to learn.

Perfection is a trifle dull. It is not the least of life's ironies that this, which we all aim at, is better not quite achieved.

Perfection in anything is unbearably dull. Myself, I prefer a touch of imperfection.

To win without risk is to triumph without glory.

It is the dull man who is always sure, and the sure man who is always dull.

The uncertainty principle signaled an end to Laplace's dream of a theory of science, a model of the universe that would be completely deterministic. We certainly cannot predict future events exactly if we cannot even measure the present state of the universe precisely!

We could still imagine that there is a set of laws that determine events completely for some supernatural being who, unlike us, could observe the present state of the universe without disturbing it. However, such models of the universe are not of much interest to us ordinary mortals. It seems better to employ the principle of economy known as Occam's razor and cut out all the features of the theory that cannot be observed.