I would be a billionaire if I was looking to be a selfish boss. That's not me.

The point of mathematics is that in it we have always got rid of the particular instance, and even of any particular sorts of entities. So that for example, no mathematical truths apply merely to fish, or merely to stones, or merely to colours. So long as you are dealing with pure mathematics, you are in the realm of complete and absolute abstraction. . . . Mathematics is thought moving in the sphere of complete abstraction from any particular instance of what it is talking about.

The vitality of thought is in adventure. Ideas won't keep. Something must be done about them. When the idea is new, its custodians have fervor, live for it, and if need be, die for it.

A great society is a society in which its men of business think greatly of their functions.

You cannot be wise without some basis of knowledge, but you may easily acquire knowledge and remain bare of wisdom.

The world is shocked, or amused, by the sight of saintly old people hindering in the name of morality the removal of obvious brutalities from a legal system.

We must produce a great age, or see the collapse of the upward striving of our race.