James Allen's books being absolutely practical have their source in the teachings of religions across the world, especially the New Testament, the Old Testament, and Buddhism, and the thoughts of World's great philosophers. As a Man Thinketh, the widely acclaimed book is second in the list of inspirational books written by Allen. Echoing the Buddhist teaching that all that we are is the result of our thoughts, Allen tries to establish in this book that, as a man thinks in his heart, so he is. Allen drives home the two essential truths of life through this book. One is that, we are what our thoughts have made us because, thought leads us to action. The other truth is that we are the architects of our future. If we believe in this, we can transform our dreams into realities.
Prosperity doesn't come from the relentless acquisition of things, but from constant improvement of one's own self – this is the quintessence of The Path of Prosperity. To go about this task of self-realisation, the prime most thing that one should do is to examine the evil within one's self and find out ways to control or destroy it. Then the path towards one's goal is clear. This is the secret that can lead a person to success, and when one succeeds, he can achieve prosperity.