As a Man ThinkethBy: James Allen Series: Classic Thoughts and Thinkers Part of the New Thought Movement, As a Man Thinketh reveals the secrets to having the most fulfilling existence possible, and it's easier than any of us could have imagined. As a Man Thinketh is James Allen's third book, first published in 1903. The title for the essay comes from the Bible, As a man thinketh in his heart, so is he (Proverbs, 23: 7), where inside, Allen details how man is the