When we cannot use the compass of mathematics or the torch of experience...it is certain we cannot take a single step forward.

When he who hears does not know what he who speaks means, and when he who speaks does not know what he himself means, that is philosophy.

All is for the best in the best of all possible worlds.

Such then is the human condition, that to wish greatness for one's country is to wish harm to one's neighbors.

But nothing is more estimable than a physician who, having studied nature from his youth, knows the properties of the human body, the diseases which assail it, the remedies which will benefit it, exercises his art with caution, and pays equal attention to the rich and the poor.

The spirit of property doubles a man's strength.

It is said that the present is pregnant with the future.