The more you know, the more you know you don't know.

Metaphysics involves intuitive knowledge of unprovable starting-points concepts and truth and demonstrative knowledge of what follows from them.

Friendship is a thing most necessary to life, since without friends no one would choose to live, though possessed of all other advantages.

Praise invariably implies a reference to a higher standard.

The bad man is continually at war with, and in opposition to, himself.

The unfortunate need people who will be kind to them; the prosperous need people to be kind to.

To be conscious that we are perceiving or thinking is to be conscious of our own existence.