This work consists of passages from Ven. Louis' works–principally his four masterpieces of spiritual theology: Book of Prayer and Meditation; The Sinner's Guide; Memorial of the Christian Life and Introduction to the Creed; plus his Compendium of Christian Doctrine. Selections are arranged by topic according the plan of the Summa Theologica of St. Thomas Aquinas. Includes a brief biography of Ven. Louis.