The man who does more than he is paid for will soon be

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The man who does more than he is paid for will soon be paid for more than he does.

Napoleon Hill

October 26, 1883 – November 8, 1970
Oliver Napoleon Hill (born October 26, 1883 – November 8, 1970) was an American self-help author. He is known best for his book Think and Grow Rich (1937) 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. Most of his books were promoted as expounding principles to achieve "success".