The last of the Ten Commandments prohibits jealousy. The Ibn Ezra struggled with how it was possible to command one not to be jealous. Previous commandments, S. D. Luzzato explains, are the training ground for this commandment: You shall not commit adultery / You shall not steal. These teach that we cannot have whatever we see and with this principle firmly in place, one can rise to the challenge of the last commandment: You shall not covet your fellow man’s house…