Certainty is the mother of quiet and repose, and…

The home to everyone is to him his castle and fortress, as well for his defence against injury and violence, as for his repose.

— Edward Coke

Certainty is the mother of repose, and therefore the common law aims at certainty.

— Philip Yorke, 1st Earl of Hardwicke

Uncertainty is wondrous, and.. certainty, were it to be real, would be moral death.

— Immanuel Wallerstein

In practice, some come to see easily, some with difficulty. But whatever the case, never mind. Difficult or easy, the Buddha said not to…

— Ajahn Chah

Neither the true nor the false roots are always real; sometimes they are imaginary; that is, while we can always imagine as many roots…

— Rene Descartes

Calculus works by making visible the infinitesimally small.

— Keith Devlin

The enormous usefulness of mathematics in the natural sciences is something bordering on the mysterious and there is no rational explanation of it.

— Eugene Wigner

“Uncertainty is a certainty in life. Unknown is well-known in life. Uncertainty and unknown gives space for the impossible to become possible. Real change…

— Kitty Downer

Of course, I don't know everything. Considering the infinite amount of knowledge that one could acquire in a virtually innumerable array of intellectual disciplines,…

— Dean Koontz

Madness is the result not of uncertainty but certainty.

— Friedrich Nietzsche

In terms of the game theory, we might say the universe is so constituted as to maximize play. The best games are not those…

— George Leonard

ALGEBRA is a general Method of Computation by certain Signs and Symbols which have been contrived for this Purpose, and found convenient.

— Colin Maclaurin

[Friedrich] Nietzsche said something marvellous, he said "Madness is not a consequence of uncertainty but of certainty", and this is fanaticism.

— Elie Wiesel

We desire truth, and find within ourselves only uncertainty. We seek happiness, and find only misery and death. We cannot but desire truth and…

— Blaise Pascal

Uncertainty is the only certainty there is, and knowing how to live with insecurity is the only security

— John Allen Paulos