I would teach peace rather than war, love rather than hate.

With fame I become more and more stupid, which of course is a very common phenomenon.

It has often been said, and certainly not without justification, that the man of science is a poor philosopher.

My opinion about Miller's experiments is the following. ... Should the positive result be confirmed, then the special theory of relativity and with it the general theory of relativity, in its current form, would be invalid. Experimentum summus judex. Only the equivalence of inertia and gravitation would remain, however, they would have to lead to a significantly different theory.

Since that deluge of newspaper articles I have been so flooded with questions, invitations, suggestions, that I keep dreaming I am roasting in Hell, and the mailman is the devil eternally yelling at me, showering me with more bundles of letters at my head because I have not answered the old ones.

If you want to make your children brilliant, tell them fairy tales. If you want to make them more brilliant, tell them more fairy tales.

It is the duty of every citizen according to his best capacities to give validity to his convictions in political affairs.