One is never satisfied with a portrait of persons whom one knows. That is why I have always pitied portraitists. One demands so seldom of others the impossible, but demands just that of the portraitists.

Woe to him who would ascribe something like reason to Chance, and make a religion of surrendering to it.

Wisdom is found only in truth.

A good man, through obscurest aspirations Has still an instinct of the one true way.

A great artist... must be shaken by the naked truths that will not be comforted. This divine discontent, this disequilibrium, this state of inner tension is the source of artistic energy.

Hatred is partial, but love is still more so.

I have heard myself accused of being an opponent, an enemy of mathematics, which no one can value more highly than I, for it accomplishes the very thing whose achievement has been denied me.