Baltasar Gracián

Never open the door to a lesser evil, for other and greater ones invariably slink in after it.

A wise man gets more use from his enemies than a fool from his friends.

Never compete with someone who has nothing to lose.

The best skill at cards is knowing when to discard.

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

Friendship multiplies the good of life and divides the evil.

Without courage, wisdom bears no fruit.

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.

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

One should cultivate good habits of memory, for it is capable of making existence a Paradise or an Inferno.