The Spiritual Life: A Treatise on Ascetical and Mystical Theology by Fr. Tanquerey is undoubtedly the finest, most comprehensive and best respected one-volume treatise on the spiritual life ever written.

Clear, thorough, easy to read, orthodox, authoritative, beautifully organized, logically developed, lively, and practical, the book covers the whole field of spirituality.

Based on Sacred Scripture, the Fathers and Doctors of the Church, especially St. Thomas Aquinas, as well as other great Saints and spiritual writers of all ages.