The Mastery of Being explores the fundamental principles of reality and their practical application in daily life. The book focuses on the concept of "being" and its connection to our thoughts, emotions, and actions. Atkinson asserts that mastering the principle of being can lead to success, happiness, and fulfillment. Throughout the chapters, the book delves into the nature of being, the power of thought, the law of attraction, and the importance of self-discipline. Drawing on spiritual and philosophical traditions such as Hinduism, Buddhism, and Theosophy, Atkinson presents a framework for understanding the essence of existence and the forces that shape our reality. He discusses the concept of spirit as the substance of life, energy, and law, emphasizing the creative power of thought. The book encourages readers to understand their identity with spirit, recognizing the immanent and transformative power within. By applying the principles of practical idealism, individuals can harness their creative potential and influence the course of their lives. This work offers insightful guidance for anyone seeking to understand the nature of reality and improve their personal and spiritual growth.