History, human or geological, represents our hypothesis, couched in terms of past events, devised to explain our present-day observations..

The statement that although the past can be recorded, the future cannot, is translatable into the statistical statement: Isolated states of order are….

There is time only to work slowly There is no time not to love.

Everybody is not completely traumatised by their life..

In truth, Freud sees nothing and understands nothing..

Failures are infinitely more instructive than successes..

For a billion years the patient earth amassed documents and inscribed them with signs and pictures which lay unnoticed and unused. Today, at last, th….

What is not possible is not to choose..

I have looked further into space than ever human being did before me. I have observed stars of which the light, it can be proved, must take two milli….

You're either in love with what you do, or you're not in love..

I believe scientists have a duty to share the excitement and pleasure of their work with the general public, and I enjoy the challenge of presenting ….

Do not call up any that you can not put down..

I am not God but something similar.

We are in the ordinary position of scientists of having to be content with piecemeal improvements: we can make several things clearer, but we cannot ….

Me? I slept like the dead, which I hoped wasn’t a sign of things to come..

Logic issues in tautologies, mathematics in identities, philosophy in definitions; all trivial, but all part of the vital work of clarifying and orga….

Ah, love. A dreadful bond! And yet, so easily severed..

m doing my best" "no,this isn't your best. We shall recognize your best when it appears.

[I attach] little importance to physical size. I don't feel the least humble before the vastness of the heavens. The stars may be large, but they can….

In the world of human thought generally, and in physical science particularly, the most important and fruitful concepts are those to which it is impo….

For it is the same whether you take it that the Earth is in motion or the Sky. For, in both the cases, it does not affect the Astronomical Science. I….