We owe a lot to the Indians, who taught us how to count, without which no worthwhile scientific discovery could have been made.

Science will stagnate if it is made to serve practical goals.

Ethical axioms are found and tested not very differently from the axioms of science. Truth is what stands the test of experience.

How can it be that mathematics, being after all a product of human thought which is independent of experience, is so admirably appropriate to the objects of reality?

I would absolutely refuse any direct or indirect war service and would try to persuade my friends to do the same, regardless of the reasons for the cause of a war.

The most precious things in life are not those you get for money.

I never allow myself to become discouraged under any circumstances. The three great essentials to achieve anything worthwhile are first, hard work, second, stick-to-ittiveness, third, common sense.