Evil conquered?' said Gwydion. 'You have learned much, but learn this last and hardest of lessons. You have conquered only the enchantments of evil. … - Lloyd Alexander

" "

Evil conquered?' said Gwydion. 'You have learned much, but learn this last and hardest of lessons. You have conquered only the enchantments of evil. That was the easiest of your tasks, only a beginning, not an ending. Do you believe evil itself to be so quickly overcome? Not so long as men still hate and slay each other, when greed and anger goad them. Against these even a flaming sword cannot prevail, but only that portion of good in all men's hearts whose flame can never be quenched.