Know, my son, that the enemy will always be with you. He will be in the shadow of your dreams and in your living flesh, for he is the other part of yourself. There will be times when he will surround you with walls of darkness. But remember always that your soul is secure to you, for your soul is entire, and that he cannot enter your soul, for your soul is part of God.
Jane Yolen, The Devil's Arithmetic
darkness, evil, god, soul