Allen's writings exemplify how harnessing the power of one's thoughts can enhance individual abilities. Despite not attaining significant renown or wealth during his lifetime, his literature still resonates with people globally, particularly within the New Thought movement.
One of Allen's most renowned works, As a Man Thinketh, first released in 1902, has since become a timeless staple in the self-help genre. Its central message asserts that virtuous thoughts cultivate noble individuals, whereas negative thoughts lead to personal discontent.
