The most splendid achievement of all is the constant striving to surpass yourself and to be worthy of your own approval.
Denis E. Waitley (born 1933), is an American motivational speaker, writer and consultant. He has been recognized as the best-selling author of the audio series, The Psychology of Winning, and books such as "Seeds of Greatness" and "The Winner's Edge".
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Read more about Denis Waitley on Wikipedia.