“Faith is much better than belief. Belief is when someone else does the thinking.”

Those who play with the devil’s toys will be brought by degrees to wield his sword.

Integrity is the essence of everything successful.

There is nothing in a caterpillar that tells you it’s going to be a butterfly.

Pollution is nothing but the resources we are not harvesting. We allow them to disperse because we’ve been ignorant of their value.

Either war is obsolete, or men are.

Most of my advances were by mistake. You uncover what is when you get rid of what isn’t.

Tombs are the clothes of the dead and a grave is a plain suit; while an expensive monument is one with embroidery.

Sometimes I think we’re alone. Sometimes I think we’re not. In either case, the thought is staggering.

Ninety-nine percent of who you are is invisible and untouchable.

Tension is the great integrity.

Man knows so much and does so little.

Nature is trying very hard to make us succeed, but nature does not depend on us. We are not the only experiment.

When I am working on a problem, I never think about beauty but when I have finished, if the solution is not beautiful, I know it is wrong.

What usually happens in the educational process is that the faculties are dulled, overloaded, stuffed and paralyzed so that by the time most people are mature they have lost their innate capabilities.

Just give me a home, in a great circle dome Where stresses and strains are at ease.

We are called to be architects of the future, not its victims.

Certainly any president – Democrat, Republican, liberal, conservative – should keep an open mind until they get the briefing.

This is a brief life, but in its brevity it offers us some splendid moments, some meaningful adventures.

For me writing biographies is impossible, unless they are brief and concise, and these are, I feel, the most eloquent.

Mathematicians come to the solution of a problem by the simple arrangement of the data, and reducing the reasoning to such simple operations, to judgments so brief, that they never lose sight of the evidence that serves as their guide.

Everything that’s lovely is But a brief, dreamy kind of delight.

The Irishman sustains himself during brief periods of joy by the knowledge that tragedy is just around the corner.

Life is brief and to have to spend every day of it doing what somebody else wants you to do is not the way to live it.

I shall be so brief that I have already finished.