You think you have troubles with mathematics . . . I assure you mine are still bigger.

Education is what remains after one has forgotten what one has learned in school.

All the fifty years of conscious brooding have brought me no closer to answer the question, "What are light quanta?" Of course today every rascal thinks he knows the answer, but he is deluding himself.

Lasting harmony with a woman (was) an undertaking in which I twice failed rather disgracefully.

The thinking it took to get us into this mess is not the same thinking that is going to get us out of it.

The last thing to collapse is the surface.

Success = 1 part work + 1 part play + 1 part keep your mouth shut