Old books that have ceased to be of service should no more be abandoned than should old friends who have ceased to give pleasure.

Always do one thing less than you think you can do.

Whatever failures I have known, whatever errors I have committed, whatever follies I have witnessed in private and public life have been the consequence of action without thought.

We can't cross that bridge until we come to it, but I always like to lay down a pontoon ahead of time.

Creativity: Take the obvious, add a cupful of brains, a generous pinch of imagination, a bucketful of courage and daring, stir well and bring to a boil.

Don't try to buy at the bottom and sell at the top. It can't be done except by liars.

Behind the black portent of the new atomic age lies a hope which, seized upon with faith, can work out salvation... Let us not deceive ourselves: we must elect world peace or world destruction.