The great end of life is not knowledge but action.

Common Sense

All truth, in the long run, is only common sense clarified.

Education

It is because the body is a machine that education is possible. Education is the formation of habits, a superinducing of an artificial organization upon the natural organization of the body.

Failure

There is the greatest practical benefit in making a few failures early in life.

Learning

Try to learn something about everything and everything about something.

Necessity

Fact I know; and Law I know; but what is this Necessity, save an empty shadow of my own mind's throwing?

Right and Rightness

It is not who is right, but what is right, that is of importance.

Truth

It is the fate of new truths to begin as heresies and end and superstitions.