It cannot be denied that for a society which has to create scarcity to save its members from starvation, to whom abundance spells disaster, and to whom unlimited energy means unlimited power for war and destruction, there is an ominous cloud in the distance though at present it be no bigger than a man's hand.

It is reasonable to hope that in the not too distant future we shall be competent to understand so simple a thing as a star.

The understanding between a non-technical writer and his reader is that he shall talk more or less like a human being and not like an Act of Parliament. I take it that the aim of such books must be to convey exact thought in inexact language... he can never succeed without the co-operation of the reader.

It is impossible to trap modern physics into predicting anything with perfect determinism because it deals with probabilities from the outset.

There was a time when we wanted to be told what an electron is. The question was never answered. No familiar conceptions can be woven around the electron; it belongs to the waiting list.

Who will observe the observers?

The pursuit of truth in science transcends national boundaries. It takes us beyond hatred and anger and fear. It is the best of us.