Self-knowledge comes from knowing other men.

The works of Lavoisier and his associates operated upon many of us at that time like the Sun's rising after a night of moonshine: but Chemistry is now betrothed to the Mathematics, and is in consequence grown somewhat shy of her former admirers.

It is said that no man is a hero to his valet. That is because a hero can be recognized only by a hero.

We know accurately only when we know little, with knowledge doubt increases.

If you start to think of your physical and moral condition, you usually find that you are sick.

If society gives up the right to impose the death penalty, then self-help will appear again and personal vendettas will be around the corner.

No one feels himself easy in a garden which does not look like the open country.