"A man's ethical behaviour should be based effectually on sympathy, education, and social ties and needs; no religious basis is necessary. Man would indeed be in a poor way if he had to be restrained by fear of punishment and hope of reward after death."
"It is the supreme art of the teacher to awaken joy in creative expression and knowledge."
"The most beautiful thing we can experience is the mysterious. It is the source of all true art and all science. He to whom this emotion is a stranger, who can no longer pause to wonder and stand rapt in awe, is as good as dead: his eyes are closed."
"Small is the number of them that see with their own eyes and feel with their own hearts."
"Everything must be made as simple as possible. But not simpler."
"Men marry women with the hope they will never change. Women marry men with the hope they will change. Invariably they are both disappointed."