There are genuine mysteries in the world that mark the limits of human knowing and thinking. Wisdom is fortified, not destroyed, by understanding its limitations. Ignorance does not make a fool as surely as self-deception.

I wonder if most people ever ask themselves why love is connected with reproduction. And if they do ask themselves about this, I wonder what answer they give.

Aristotle uses a mother's love for her child as the prime example of love or friendship.

Conjugal love, or the friendship of spouses, persists after sexual desires have weakened, withered, and disappeared.

Freedom is the emancipation from the arbitrary rule of other men.

Philosophy is everybody's business.

The telephone book is full of facts, but it doesn't contain a single idea.