'A man is literally what he thinks, his character being the complete sum of all his thoughts.' The two books contained within this illuminating hardback volume are a great introduction to the philosophy of the writer and philosopher, James Allen. As a Man Thinketh is a concise philosophical essay that explores the transformative power of thought. The central idea is that a person's thoughts shape their character, circumstances, and destiny. Allen argues that the mind is like a garden, where thoughts are the seeds, and the quality of the mental "soil" determines the outcomes in life. The book emphasizes that we are the product of our thoughts. Noble thoughts lead to a noble life, while negative or selfish thoughts result in a life of suffering and hardship. Allen stresses personal responsibility, urging readers to recognize that their external conditions are a reflection of their inner mental state.

Mastery of Destiny builds on these ideas by advocating for self-mastery in the act of shaping one's life. The central theme of the book is that a person has the ability to control their own destiny through disciplined thought, action, and character development. The work encourages readers to embrace personal responsibility, avoid self-pity or excuses, and focus on positive, constructive thoughts and behaviors. Through such mental discipline, Allen believes individuals can overcome challenges, transform their character, and align themselves with their highest potential. Ultimately, the book presents a vision of personal empowerment, stressing that each person is the architect of their own fate.