Self-sufficiency is the greatest of all wealth.

Since it is every man's interest to be happy through the whole of life, it is the wisdom of every one to employ philosophy in the search of felicity without delay; and there cannot be a greater folly, than to be always beginning to live.

That which does not kill us makes us stronger.

You see things; you say, 'Why?' But I dream things that never were; and I say Why not?

The educated differ from the uneducated as much as the living differs from the dead.

Many men go fishing all of their lives without knowing that it is not fish they are after.