Corpses that move on command are always preferrable to those that operate on instinct. Never let your undead roam freely—and always remember to clean up after you are finished with them.

—Necromancy for Nitwits, Chapter 1

Never is man closer to his primitive nature than after a visit from death. When life escapes him, instincts take over, and he turns back into what he has always been—a ravenous beast.