A reasonable man adjusts himself to the world. An unreasonable man expects the world to adjust itself to him. Therefore all progress is made by unreasonable people.

Man is born for uprightness. If a man lose his uprightness and yet live, his escape from death is mere good fortune.

Those who break down the dikes will themselves be drowned in the inundation.

At seventy, I could follow the dictates of my own heart; for what I desired no longer overstepped the boundaries of right.

The gentleman prefers to be slow in word but diligent in action.

Not knowing life, how can we know death? Why talk of spirits when you do not understand men?

A man who reviews the old so as to find out the new is qualified to teach others.