A good scientist must accept the challenge that one day everything he believes could be wrong.

Sixty years ago the idea of everyone having a telephone in their pockets was science fiction. Our whole way of life is science fiction, if you look at it from the past.

A good traveler has no fixed plans, and is not intent on arriving.

I have thought about it a great deal, and the more I think, the more certain I am that obedience is the gateway through which knowledge, yes, and love, too, enter the mind of the child.

If American politics are too dirty for women to take part in, there's something wrong with American politics.

One should practice much sense, not much learning.

You know, it's quite all right to give the underdog a hand, but only one hand. Keep the other hand on your pistol - or he'll try to eat the one you gave him!

The long game was ended, the Snitch had been caught, it was time to leave the air.

You're not free, unless you come to the place where you have nothing to prove.

The agitator seizes the word. The artist is seized by it.

I have been a vulnerable target for those who want money.

I'd much rather do one or two takes of one thing and then see how it goes.