The purest form of religion on earth, says Rome, is to bow before a piece of bread and worship it. “The Eucharist is ‘the source and summit of the Christian life,’ ” and “is the heart and the summit of the Church’s life,” says the Catechism of the Catholic Church (1324, 1407). And “the prayer of thanksgiving and consecration,” is “the heart and summit of the celebration” (1352). It is at the utterance of the consecration, the priest’s words, “This is My body,” and “This is the cup of My blood,” that the bread and wine are said to...