A man who does not forget an agreement is resolved and honorable man.

Worry not that no one knows you; seek to be worth knowing.

If I hold up one corner of a square and the student cannot workout the other three for himself, I won't go any further.

There may be men who act without understanding why. I do not. To listen much, pick out the good and follow it; to see much and ponder it: this comes next to understanding.

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.

When we have intelligence resulting from sincerity, this condition is to be ascribed to nature; when we have sincerity resulting from intelligence, this condition is to be ascribed to instruction. But given the sincerity, and there shall be the intelligence; given the intelligence, and there shall be the sincerity.

The commander of the forces of a large State may be carried off, but the will of even a common man cannot be taken from him.