Chapter 1: Thought and Character. In this chapter, Allen proposes that our thoughts shape our character, circumstances, and life. He suggests that good thoughts lead to good deeds, while negative thoughts bring misery. Just as a gardener cultivates his plot, we must cultivate our minds.

Chapter 2: Effect of Thought on Circumstances. Allen articulates that our circumstances are a result of our thoughts. He argues that our mind is a gushing stream that can be directed positively or negatively, shaping our circumstances. For instance, a positive and determined man can overcome adverse conditions, whereas the opposite is true for a weak and indecisive person.

Chapter 3: Effect of Thought on Health and the Body. In this chapter, Allen suggests that our thoughts significantly influence our health. He claims that ill-health often originates from gloomy, fear-driven thoughts while good health stems from cheerful, hopeful thoughts. Allen emphasizes the importance of calm, peaceful, and harmonious thoughts for overall vitality.

Chapter 4: Thought and Purpose. Allen underscores the importance of having a clear purpose in life. A man who continuously works towards his purpose and steers his thoughts towards it will be successful. However, the opposite holds true for a man lacking a distinct purpose in his life.

Chapter 5: The Thought Factor in Achievement. Allen posits that achievement requires work, thought, and character combined with purpose. He suggests that talent without these elements often leads to failure. He further advises against disparaging yourself or others for past failures, emphasizing the benefit of constructive criticism.

Chapter 6: Visions and Ideals. In the sixth chapter, Allen talks about how visions and dreams create our reality. He emphasizes that any dream can become a reality with the right amount of work, perseverance, and faith coupled with guiding one’s thoughts.

Chapter 7: Serenity. Allen ends his book by discussing the virtue of serenity – a calm, peaceful state of mind. He posits that one can achieve serenity by maintaining a calm mind amidst chaos. A serene individual can think clearly and not be swayed by fear, anger, or despair.