Whenever anyone says, 'theoretically,' they really mean, 'not really.'

There was no 'before' the beginning of our universe, because once upon a time there was no time.

Science without religion is lame, religion without science is blind.

The most beautiful thing we can experience is the mysterious. It is the source of all true art and science.

To raise new questions, new possibilities, to regard old problems from a new angle, requires creative imagination and marks real advance in science.

Science is a wonderful thing if one does not have to earn one's living at it.

The grand aim of all science is to cover the greatest number of empirical facts by logical deduction from the smallest number of hypotheses or axioms.

Most of the fundamental ideas of science are essentially simple, and may, as a rule, be expressed in a language comprehensible to everyone.

The whole of science is nothing more than a refinement of everyday thinking.

The man of science is a poor philosopher.