If history repeats itself, and the unexpected always happens, how incapable must Man be of learning from experience.

We learn from experience that men never learn anything from experience.

Men are wise in proportion, not to their experience, but to their capacity for experience.

When I was young, I observed that nine out of ten things I did were failures. So I did ten times more work.

Never fret for an only son, the idea of failure will never occur to him.