A mind ill with negative attitudes is more dangerous than a sick body, for its sickness is always contagious.

Your ability to use the principle of autosuggestion will depend, very largely, upon your capacity to concentrate upon a given desire until that desire becomes a burning obsession.

There is some one thing that you can do better than anyone else in the world could do it. Search until you find out what this particular line of endeavor is, then organize all of your forces and attack it with the belief that you are going to win.

The average person would have quit at the first failure. That’s why there have been many average men and only one Edison.

Napoleon Hill saw this law of transmutation as the seed of equivalent benefit: With every disappointment, heartbreak, or failure, there exists an equal (usually greater) positive benefit.

One must marry one's feelings to one's beliefs and ideas. That is probably the only way to achieve a measure of harmony in one's life.

Scars are wisdom in disguise.