In the works of J.R.R. Tolkien, what is meant theologically by the use of light? In this third and final part of my discussion with Dan Ray, we talk at length about the underlying mythology of Middle-earth, and how Tolkien's own Catholic faith provided and influence on the metaphysical nature of his fictional world. Brace yourself as I nerd-gush about the particulars of Tolkien's mythology at near Colbert-like levels.