The only path by which another person can upset you is through your own thought.

Part of me suspects that I'm a loser, and the other part of me thinks I'm God Almighty.

Think good, and good follows. Think evil, and evil follows. You are what you think all day long.

Thinking is the talking of the soul with itself.

A man is but the product of his thoughts. What he thinks he becomes.

Insanity is doing the same thing over and over again and expecting different results.

The highest possible stage in moral culture is when we recognise that we ought to control our thoughts.

Only a life lived for others is a life worthwhile.

Why does the eye see a thing more clearly in dreams than the imagination when awake?