Theology Needs Philosophy brings together essays by leading theologians and philosophers on the fundamental importance of human reason and philosophy for Catholic theology and human cultures generally. This edited collection studies the contributions of reason, with its acquired wisdom, science, and scholarship, in five sections. Those sections are: (1) the inevitable presence and service of philosophy in theology; (2) the metaphysics of creation, nature, and the natural knowledge of God; (3) the history of Logos as reason in the fathers, in St. Thomas Aquinas, and Medieval Biblical commentaries; (4) the role of reason in Trinitarian theology, Christology, and Mariology; and finally (5) reason in the theology of Aquinas.