Meat-eating is undesirable if the person is interested in physical and mental well-being, in securing tranquility for the body and mind. … The greatest religious teachers have always recommended a vegetarian diet because it is a diet that stills the mind as well as strengthening the body. They are unanimous in saying that a peaceful mind, a serene mind, is necessary to recognize the God within you. "Blessed are the pure in hearth; they shall see God," the Bible says. And yoga strives to calm and pacify the mind so that the person can recognize the God within.
Interview in The Vegetarians by Rynn Berry (Brookline, MA: Autumn Press, 1979), pp. 166-167.