For the most part, I do the thing which my own nature prompts me to do. It is embarrassing to earn so much respect and love for it.

From a certain temperature on, the molecules 'condense' without attractive forces; that is, they accumulate at zero velocity. The theory is pretty, but is there some truth in it.

I sometimes ask myself how it came about that I was the one to develop the theory of relativity. The reason, I think, is that a normal adult never stops to think about problems of space and time. These are things which he has thought about as a child. Bu t my intellectual development was retarded,as a result of which I began to wonder about space and time only when I had already grown up.

While you're trying to get ahead, remember to get aheart as well. When your only problem IS a nail, all you want is a decent hammer. There are only two ways to live your life: one is as though nothing is a miracle; the other is as though everything is a miracle.

If I were to remain silent, I'd be guilty of complicity.

This is what the painter, the poet, the speculative philosopher, and the natural scientists do, each in his own fashion.

My sailing system set sail, make it fast, no thoughts of energy or velocity, loll back, let boat drift.