In "Advanced Course in Yogi Philosophy and Oriental Occultism," Atkinson delves deeper into the esoteric and mystical aspects of Yogi Philosophy. The book covers a wide range of topics, including:Yogi Philosophy: Atkinson introduces the fundamental principles of Yogi Philosophy, a system of spiritual and philosophical teachings derived from ancient Indian traditions.Occultism: The book explores various occult principles and practices, providing insights into hidden knowledge and the workings of the unseen realms.Mental and Psychic Development: Atkinson discusses techniques and exercises for mental and psychic development, including meditation, concentration, and visualization.Higher Consciousness: The book delves into the concept of higher consciousness, spiritual evolution, and the path to self-realization.Cosmic Laws: Atkinson explains the universal laws that govern the cosmos, including the law of attraction and the law of cause and effect.The Astral Plane: The book explores the astral plane and its connection to the physical world, as well as astral projection and psychic phenomena.