All that glitters may not be gold, but at least it contains free electrons.

It is characteristic of science that the full explanations are often seized in their essence by the percipient scientist long in advance of any possible proof.

The present aristocracy of western culture, at the very moment when it most clearly dominates the world, is being imitated rapidly and successfully in every eastern country.

Published papers may omit important steps and the memory of men of science, even the greatest, is sadly fallible.

But if capitalism had built up science as a productive force, the very character of the new mode of production was serving to make capitalism itself unnecessary.

The relevance of Marxism to science is that it removes it from its imagined position of complete detachment and shows it as a part, but a critically important part, of economy and social development.

Life is a partial, continuous, progressive, multiform and conditionally interactive self-realization of the potentialities of atomic electron states.

The full area of ignorance is not mapped. We are at present only exploring the fringes.

The beauty of life is, therefore, geometrical beauty of a type that Plato would have much appreciated.

The greater the man, the more he is soaked in the atmosphere of his time; only thus can he get a wide enough grasp of it to be able to change substantially the pattern of knowledge and action.

The only way of learning the method of science is the long and bitter way of personal experience.

Life will go on without you, because in the end it's not about you.

These quasi-faithful are growing in strength. They are the fundamentalists today, and they abound in all the religions.

You were born to dream. You were born to strive. You were born to conquer. You were born to rise.

Failure is that early morning hour of darkness which precedes the dawning of the day of success.

A rocket is a reed that thinks brilliantly.

I never really look back. I just approach life (taking) it one day at a time. I'm just really grateful.

Anybody in the next centuries wanting to know what it was like to be a poet in the middle of the 20th century should read Kaddish.

Whenever we touch someone's life, we leave a trace over there. Always leave good traces so that you can walk in the streets freely!

If you want to communicate, use the telephone

I am a human being, not a human doing. Don't equate your self-worth with how well you do things in life. You aren't what you do. If you are what you do, then when you don't . . , you aren't.