Alister McGrath is a well-known name in Christian philosophy, science, and apologetics. His book, The Open Secret is his call to Christians to develop natural theology not just as philosophically, but as a system of theology which touches on all aspects of life. Natural theology, according to McGrath, is not just a way to argue for the existence of God. Rather, “The enterprise of natural theology… is one of discernment, of seeing nature in a certain way…” (3). He argues that natural theology in fact should not be viewed as a system to prove the existence of God. Rather, it “addresses fundamental questions about divine disclosure and human cognition and perception. In what way can human beings, reflecting on nature by means of natural processes, discern the transcendent?” (5, emphasis his). Natural theology can be seen as an entire worldview, put forth to view the world in a certain way (17). McGrath, after outlining his vision thus, turns to the human experience of the transcendent. He focuses on three thinkers- Iris Murdoch, Roy Bhaskar, and John Dewey (41ff). He then turns to various ways humans have accessed the transcendent (59ff) and includes an evaluation of the psychology of perception (80ff).