Aquinas’ theology can be understood only if one comes to grips with his metaphysics of being. The relevance of this perspective is exhibited in his treatment of topics like creation, goodness, happiness, truth, freedom of the will, the unity of the human being, prayer and providence, God’s personhood, divine love, God and violence, God’s unknowablility, the Incarnation, the Trinity, God’s existence, theological language and even laughter. This book endeavors to treat these questions in a clear and convincing language.