Man must strive, and striving he must err.

One should not wish anyone disagreeable conditions of life; but for him who is involved in them by chance, they are touchstones of characters and of the most decisive value to man.

The older we grow, the greater become the ordeals.

The greatest step forward would be to see that everything factual is already theory. The blueness of the sky reveals the basic lawof chromatics. Don't look for anything behind the phenomena, they themselves are the doctrine.

Is not the core of nature in the heart of man?

Character is constructed amidst the tempests of the World

Great necessity elevates man, petty necessity casts him down