“Is any theme or motif in Western art history more loaded than that of darkness? Associations range from elegance to profundity, from grief to pure evil.  ... [Eugene Lemay’s] trajectory suggests that there may be validity to the old argument, made most forcefully by St. Augustine and St. Thomas Aquinas, that evil is simply the absence of goodness (as darkness is the absence of light) and that goodness could not be apprehended—or even meaningfully exist—without it.”
Richard Vine