“The struggle between good and evil / is the primal disease of the mind,” wrote the sixth-century Zen master Seng-ts’an, who knew what he was talking about. It is all too easy to see ourselves as fighting on God’s side, to identify our ideology with what is best for the world and use it to justify crusades, pogroms, or preemptive attacks. Projecting evil onto the world makes me unassailably right—a position as dangerous in politics as in marriage.
