Harry Lorayne quotes:

Curiosity killed the cat, but where human beings are concerned, the only thing a healthy curiosity can kill is ignorance.

Thinking clearly and effectively is the greatest asset of any human being.

Most problems precisely defined are already partially solved.

Never apologize, it's all part of the trick.

Thinking clearly and effectively is the greatest asset of any human being. We are constantly reminded that the one superiority that man has over other animals is the ability to think. It is primarily our ability to think that sets us apart from other animals.