Frederick Douglass on wisdom

No man can put a chain about the ankle of his fellow man without at last finding the other end fastened about his own neck.

Where there is seeming contentment with slavery, there is certain treachery to freedom.

To suppress free speech is a double wrong. It violates the rights of the hearer as well as those of the speaker.

The only true wisdom is in knowing you know nothing.

Socrates470–399 BC

By three methods we may learn wisdom: First, by reflection, which is noblest; Second, by imitation, which is easiest; and third by experience, which is the bitterest.

Confucius551–479 BC

True wisdom comes to each of us when we realize how little we
understand about life, ourselves, and the world around us.