If I had an hour to solve a problem and my life depended on the solution, I would spend the first 55 minutes determining the proper question to ask, for once I know the proper question, I could solve the problem in less than five minutes.

Time and space are not conditions of existence, time and space is a model for thinking

During the youthful period of mankind's spiritual evolution human fantasy created gods in man's own image, who, by the operations of their will were supposed to determine, or at any rate to influence, the phenomenal world. Man sought to alter the disposition of these gods in his own favour by means of magic and prayer.

If there is no price to be paid, it is also not of value.

Nothing happens until something moves.

I have repeatedly said that in my opinion the idea of a personal God is a childlike one.

When forced to summarize the general theory of relativity in one sentence: Time and space and gravitation have no separate existence from matter.