All of us are engaged in a personal, ongoing battle with sin and vice. The seven deadly sins--lust, greed, envy, anger, pride, gluttony, and sloth--are our main antagonists in this struggle. They are primary causes of unhappiness and immorality, and because of their pervasive nature, have been of perennial interest to religious thinkers, philosophers, dramatists, and poets.
Although our anger doesn't make most of us murderers, our lust doesn't...