It is dangerous to abandon one's self to the luxury of grief; it deprives one of courage, and even of the wish for recovery.

Common sense is calculation applied to life.

Nothing is more characteristic of a man than the manner in which he behaves toward fools.

There is no curing a sick man who believes himself to be in health.

True humility is contentment.

To know where one is going and what one wishes - this is order ... to organize one's life to distribute one's time ... all this belong to and is included in the word order.

Cleverness is serviceable for everything, sufficient for nothing.