Gregory of Nyssa

Let it be observed that there is no such thing in the world as evil irrespective of a will. Evil is not discoverable in a substance apart from willing. Every creature of God is good, and nothing of his "to be rejected." All that God made was "very good." But the habit of sinning entered as we have described, and with fatal quickness, into the life of man. From that small beginning spread into this infinitude of evil. Then that godly beauty of the soul which was an imitation of the Archetypal Beauty, like fine steel blackened with vicious rust, preserved no longer the glory of its familiar essence but was disfigured with the ugliness of sin.