One is happy as a result of one's own efforts, once one knows of the necessary ingredients of happiness-simple tastes, a certain degree of courage, self-denial to a point, love of work, and, above all, a clear conscience. Happiness is no vague dream, of that I now feel certain.

O heart! love is thy bane and thy antidote.

[Failure is hard initially because] One knows what one has lost, but not what one may find [and learn from that failure]!

You may impose silence upon me, but you can not prevent me from thinking.

living for oneself is a bad thing. The keenest intellectual pleasure comes from being able to return to the self after being absent from it for a spell. But living all the time inside the self, that most tyrannical, demanding and capricious of companions - no, one shouldn't do it.

... everyone's free to embark on either a great clipper or a little fishing boat. An artist is an explorer who oughtn't to shrink from anything: it doesn't matter whether he goes to the left or the right -- his goal sanctifies all.

I would rather believe that God did not exist than believe that he was indifferent.