Fig. 1. Michelangelo Merisi da Caravaggio - The Incredulity of Saint Thomas, 1602-3
'Sacrifice restores to the sacred world that which servile use has degraded, rendered profane. Servile use has made a thing (an object) of that which, in a deep sense, is of the same nature as the subject, is in a relation of intimate participation with the subject. It is not necessary that the sacrifice actually destroy the animal or plant of which man had to make a thing for his use. They must at least be destroyed as things, that is, insofar as they have become things.'