Fools and fanatics are always so certain of themselves.

To be without some of the things you want is an indispensable part of happiness.

You must believe that you can help bring about a better world.

One of the symptoms of an approaching nervous breakdown is the belief that one's work is important.

The only thing that will redeem mankind is cooperation.

My whole religion is this: do every duty, and expect no reward for it, either here or hereafter.

It is the things for which no evidence is believed with passion.

Beware the man of the single book

Belief systems provide a programme that relieves the necessity of thought.

There is much pleasure to be gained from useless knowledge.

War doesn't determine who's right, it determines who's left

Life is nothing but a competition to be the criminal rather than the victim.

The best life is the one in which the creative impulses play the largest part and the possessive impulses the smallest.

The fact that an opinion has been widely held is no evidence that it is not utterly absurd.

A smile happens in a flash, but its memory can last a lifetime.

What men want is not knowledge but certainty.

To understand the actual world as it is, not as we should wish it to be, is the beginning of wisdom.

No great achievement is possible without persistent work.

To realize the unimportance of time is the gate to wisdom.