Nature does nothing uselessly.
Quit now, you'll never make it. If you disregard this advice, you'll be halfway there.
The weak can never forgive. Forgiveness is the attribute of the strong.
Man's main task in life is to give birth to himself, to become what he potentially is.
Practice yourself what you preach.
Perhaps the most valuable result of all education is the ability to make yourself do the thing you have to do when it ought to be done whether you like it or not.
Man is the only animal whose desires increase as they are fed; the only animal that is never satisfied.
Think of yourself as on the threshold of unparalled success. A whole clear, glorious life lies before you. Achieve! Achieve!
Either war is obsolete or men are.
Above all things, never be afraid. The enemy who forces you to retreat is himself afraid of you at that very moment.