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

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.

Philosophically, the notion of a beginning of the present order of Nature is repugnant to me ... I should like to find a genuine loophole.

In the most modern theories of physics probability seems to have replaced aether as "the nominative of the verb 'to undulate'."

Whatever else there may be in our nature, responsibility toward truth is one of its attributes.

We have found that where science has progressed the farthest, the mind has but regained from nature that which the mind put into nature.

Our ultimate analysis of space leads us not to a "here" and a "there," but to an extension such as that which relates "here" and "there." To put the conclusion rather crudely-space is not a lot of points close together; it is a lot of distances interlocked.