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

Life is like riding a bicycle. To keep your balance, you must keep moving.

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

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

Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.

Reality leaves a lot to the imagination.

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

I have no special talents. I am only passionately curious.

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