This great book by James Allen puts the responsibility for personal development and transformation on the individual and establishes, without a doubt, a clear connection between what one thinks and what one is, and how one can change one's life by changing one's thoughts. It is truly one of the most inspiring piece of work ever written...
Reasons why "As A Man Thinketh" is the Greatest Inspirational Book Ever Written
It helps us realize that we are the makers of ourselves.
It puts the responsibility for our spiritual and material development and wellbeing in our own hands.
Reading and re-reading it lifts us up when we are down.
It inspires us to goal-attainment in spite of any adversities experienced along the way.
It teaches us that our thought process is responsible for any situation we are in, and that by changing our thought process we can change our outer condition.