Belief in an external world independent of the perceiving subject is the basis of all natural science.

Ever since childhood I have scorned the commonplace limits so often set upon human ambition. Possessions, outward success, publicity, luxury - to me these have always been contemptible. I believe that a simple and unassuming manner of life is best for everyone; best both for the body and the mind

The mathematician knows some things, no doubt, but not those things one usually wants to get from him.

I refuse to engage in an intellectual battle with an unarmed man.

I very rarely think in words at all. A thought comes, and I may try to express in words afterwards.

The Bible is a great source of wisdom and consolation and should be read frequently.

In matters of truth and justice, there is no difference between large and small problems, for issues concerning the treatment of people are all the same.