In Biblical Faith and Natural Theology, Barr sets forth a self-consciously biblical case for the legitimacy and reality of natural theology, that is, a knowledge or understanding of truths about God available to all humans via the natural order (in contrast to knowledge via “special” revelation, such as inspired religious texts). In so doing, he attacks head-on the view of Barth and those modern theologians largely influenced by him, who maintain that there is no place for natural theology in a truly Christian revelational theology.