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

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

Change your thoughts, and you change your destiny.

A clever person solves a problem. A wise person avoids it.

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

Reality is merely an illusion.

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.

Once we accept our limits, we go beyond them.