When Charles Williams died in 1945 there remained to us of his work, besides his published books and those which he had in preparation for the press, a number of essays which had appeared in periodicals and elsewhere, many of which contain important statements of his ideas. A selection of these is printed here. —from the Introduction. Charles Williams was one of the finest — not to mention one of the most unusual — theologians of the twentieth century. His mysticism is palpable — the unseen world interpenetrates ours at every point, and spiritual exchange occurs all the time, unseen and largely unlooked for. His novels are legend, and as a member of the Inklings, he contributed to the mythopoetic revival in contemporary culture.