Baltasar Gracián

Never contend with a man who has nothing to lose.

It is better to sleep on things beforehand than lie awake about them afterward.

Two kinds of people are good at foreseeing danger: those who have learned at their own expense, and the clever people who learn a great deal at the expense of others.

Without courage, wisdom bears no fruit.

Friendship multiplies the good of life and divides the evil.

A synonym is a word you use when you can't spell the other one.

Never compete with someone who has nothing to lose.