"In Darwin's theory, you just have to substitute 'mutations' for his 'slight accidental variations' . In all other respects little change was necessary in Darwin's theory..."

“It seems plain and self-evident, yet it needs to be said: the isolated knowledge obtained by a group of specialists in a narrow field has in itself no value whatsoever, but only in its synthesis with all the rest of knowledge and only inasmuch as it really contributes in this synthesis toward answering the demand, "Who are we?”

“I would not call one but rather the characteristic trait of quantum mechanics, the one that enforces its entire departure from classical lines of thought.”

“We have just introduced the term gene for the hypothetical material carrier of a definite hereditary feature...”

“Although I think that life may be the result of an accident, I do not think that of consciousness. Consciousness cannot be accounted for in physical terms. For consciousness is absolutely fundamental. It cannot be accounted for in terms of anything else.”

“Our mind, by virtue of a certain finite, limited capability, is by no means capable of putting a question to Nature that permits a continuous series of answers. The observations, the individual results of measurements, are the answers of Nature to our discontinuous questioning.”

“The self is not so much linked to its ancestors, it is not so much the product, and merely the product, of all that, but rather, in the strictest sense of the word, the same thing as all that: the strict, direct continuation of it, just as the self aged fifty is the continuation of the self aged forty.”