If one asks the whence derives the authority of fundamental ends, since they cannot be stated and justified merely by reason, one can only answer: they exist in a healthy society as powerful traditions, which act upon the conduct and aspirations and judgments of the individuals; they are there, that is, as something living, without its being necessary to find justification for their existence.

Music has no effect on research work, but both are born of the same source and complement each other through the satisfaction they bestow

The value of a man resides in what he gives

Without deep reflection one knows from daily life that one exists for other people.

Never memorize something that you can look up.

The secret to creativity is knowing how to hide your sources.

When a man points a finger at someone else, he should remember that three of his fingers are pointing at himself. Do not worry about your difficulties in mathematics; I can assure you that mine are still greater.