Widely considered the greatest self-help book of all-time, As a Man Thinketh reveals how our thoughts determine our character, circumstances, health, appearance, and achievements. The choice is ours: either master our thoughts to create the life we want, or remain mired in frustration and failure. While James Allen's writing was exceptionally clear for its time, As a Man Thinketh -- like any 100-year-old book -- uses archaic language that can be difficult to grasp. This 21st Century Edition rephrases Allen's ideas in contemporary English, making his wisdom available to today's readers.