Ignorance once dispelled is difficult to reestablish.

Against logic there is no armor like ignorance.

You can always tell a real friend: when you've made a fool of yourself he doesn't feel you've done a permanent job.

Originality is the fine art of remembering what you hear but forgetting where you heard it.

Real, constructive mental power lies in the creative thought that shapes your destiny, and your hour-by-hour mental conduct produces power for change in your life. Develop a train of thought on which to ride. The nobility of your life as well as your happiness depends upon the direction in which that train of thought is going.

There is no stigma attached to recognizing a bad decision in time to install a better one.

Many an optimist has become rich simply by buying out a pessimist.