""Spiritualism and the Deepening of Spiritual Life"" by W.J. Colville is a book that explores the concept of spiritualism and how it can be used to deepen one's spiritual life. The author delves into the history of spiritualism and its connection to various religious and philosophical traditions, including Christianity, Hinduism, and Buddhism. He also discusses the principles of spiritualism, such as the belief in the existence of the soul and the...