Thomas Aquinas’s classic Treatise on Divine Law is brought to life in this illuminating line-by-line commentary, which acts as a sequel to Budziszewski’s Commentary on Thomas Aquinas’s Treatise on Law. In this new work, Budziszewski reinvestigates the theory of divine law in Aquinas’s Summa Theologiae, exploring questions concerning faith and reason, natural law and revelation, the organization of human society, and the ultimate destiny of human life. This interdisciplinary text includes thorough explanations, applications to life, and ancillary discussions that open up Aquinas’s dense body of work, which tends to demand a great deal from readers. More than a half-century has passed since the last commentary on Thomas Aquinas’s view of these matters. Budziszewski fills this gap with his consideration of not only the medieval text under examination, but also its immediate relevance to contemporary thought and issues of the modern world.