You can watch a video showing Napoleon Hill talking about a conversation he had with Andrew Carnegie about the power of the mind. On the same page you can also read some of Napoleon Hill quotes.
Napoleon Hill Video and Quotes
The reason man may become the master of his own destiny is because he has the power to influence his own subconscious mind.
We are what we are, because of the vibrations of thought which we pick up and register, through the stimuli of our daily environment.
Do not wait; the time will never be “just right.” Start where you stand, and work with whatever tools you may have at your command, and better tools will be found as you go along.