Napoleon Hill was an American self-help author. He is known best for his book Think and Grow Rich which is among the 10 best-selling self-help books of all time. Hill's works insisted that fervid expectations are essential to improving one's life. If you are interested in Napoleon Hill 17 Principles of Success. Click the youtube link and watch the video.
https://www.youtube.com/watch?v=KWt8iYEfSNE