Let us consider, first, the need for a tough mind, characterized by incisive thinking, realistic appraisal, and decisive judgment. The tough mind is sharp and penetrating, breaking through the crust of legends and myths and sifting the true from the false.

From his neck down a man is worth a couple of dollars a day, from his neck up he is worth anything that his brain can produce.

The mind is everything. What you think you become.

The cheerful mind perseveres and the strong mind hews its way through a thousand difficulties.

All wrong-doing arises because of mind. If mind is transformed can wrong-doing remain?

Never waste a minute thinking about people you don't like.