Jesus is too colossal for the pen of phrasemongers, however artful. No man can dispose of Christianity with a bon mot

A theory can be proved by experiment; but no path leads from experiment to the birth of a theory.

Enjoying the joys of others and suffering with them-these are the best guides for man.

Not all things worth counting are countable and not all things that count are worth counting.

The mere formulation of a problem is far more essential than its solution, which may be merely a matter of mathematical or experimental skills. To raise new questions, new possibilities, to regard old problems from a new angle requires creative imagination and marks real advances in science.

Intelligent life on other planets? I'm not even sure there is on earth!

I don't try to imagine a personal God; it suffices to stand in awe at the structure of the world, insofar as it allows our inadequate senses to appreciate it.