John Donne on wisdom

No man is an island, entire of itself; every man is a piece of the continent.

Any man’s death diminishes me, because I am involved in Mankind; And therefore never send to know for whom the bell tolls; it tolls for thee.

Love built on beauty, soon as beauty, dies.

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.