[When questioned on his longevity] First of all, I selected my ancestors very wisely. ... They were long-lived, healthy people. Then, as a chemist, I know how to eat, how to exercise, keep my blood circulating. ... I don't worry. I don't get angry at people. I don't worry about things I can't help. I do what I can to make the world a better place to live, but I don't complain if things aren't right. As a scientist I take the world as I find it.

[When questioned on his longevity] First of all, I selected my ancestors very wisely. ... They were long-lived, healthy people. Then, as a chemist, I know how to eat, how to exercise, keep my blood circulating. ... I don't worry. I don't get angry at people. I don't worry about things I can't help. I do what I can to make the world a better place to live, but I don't complain if things aren't right. As a scientist I take the world as I find it.

That there is no such thing as the scientific method, one might easily discover by asking several scientists to define it. One would find, I am sure, that no two of them would exactly agree. Indeed, no two scientists work and think in just the same ways.

Instead of adjusting students to docile membership in whatever group they happen to be placed, we should equip them to cope with their environment, not be adjusted to it, to be willing to stand alone, if necessary, for what is right and true.

The best person able to appraise promise as a mathematician is a gifted teacher, and not a professional tester.

A child of the new generation Refused to learn multiplication. He said 'Don't conclude That I'm stupid or rude; I am simply without motivation.'

The men who have had the most to give to their fellow men are those who have enriched their minds and hearts in solitude. It is a poor education that does not fit a man to be alone with himself.