Jacques Lacan never seems to exhaust the full significance of a bnef scenario from Saint Augustine's Confessions: ‘I have myself seen jealousy in a baby and know what it means. He was not old enough to talk, but, whenever he saw his foster-brother at the breast, he would grow pale with envy’ (Bk. i, Ch. 7). References to the anecdote appear in Lacan's writings from The Family Complexes (1938)...