This week's episode goes over St. Augustine's privation theory of evil. After being influenced by Neo-Platonism, Augustine measures evil as a lack of goodness because "being" in-and-of-itself entails a measure of goodness. In other word, that which has being, has goodness. Therefore even Satan is measured in terms of a lack of goodness while still having goodness simply by virtue of being. Incendiary though that might be, listen for more details!