As A Man Thinketh is a powerful philosophy that will make you achieve perfection through the purity of thought.? ? More than that this book will help you transform your thoughts into concrete actions that will result in the achievement of anything that you deeply desire in your heart.? As a Man Thinketh by James Allen ? propounds that a man is his dream. He goes on to explain that what a man thinks about is what he becomes. In the book, readers are introduced to effect of thought on circumstances; effect of thought on health and body; thought and purpose; thought factor in achievement; vision and ideals and serenity.