"For him there was no frontier between the material and the spiritual world. Had I ever to spend a night in a haunted house, I should have felt secure with Williams in my company; he was somehow protected from evil, and was himself a protection... To him the supernatural was natural, and the natural was also supernatural... Williams' understanding of Evil was profound... He is concerned, not with the Evil of conventional morality and the ordinary manifestations by which we recognize it, but with the essence of Evil; it is therefore Evil which has no power to attract us, for we see it as the repulsive thing it is, and as the despair of the damned from which we recoil."
T.S. Eliot's introduction to All Hallow's Eve (extract)