“I have personally watched and studied a jealous baby,” Saint Augustine reports in his Confessions. “He could not speak and, pale with jealousy and bitterness, glared at his brother sharing his mother’s milk.” Regarding the baby’s sinister intent, Augustine contends that “it can hardly be innocence,” when the milk “is flowing richly and abundantly, not to endure a share going to one’s blood brother, who is in profound need.”