Man has received direct from God only one instrument wherewith to know himself and to know his relation to the universe--he has no other--and that instrument is reason.

Knowledge is invariably a matter of degree: you cannot put your finger upon even the simplest datum and say this we know.

No two people on earth are alike, and it's got to be that way in music or it isn't music.

It has yet to be proven that intelligence has any survival value.

We can easily forgive a child who is afraid of the dark; the real tragedy of life is when men are afraid of the light.

Success is counted sweetest by those who never succeed.

Your best teacher is your last mistake.

Happiness is like those palaces in fairy tales whose gates are guarded by dragons: we must fight in order to conquer it.

Respect is what we owe; love, what we give.

You must trust and believe in people or life becomes impossible.