For if anything is caused through folly, and the operation or rather co-operation of the devil, this thing is not straightway the devil or folly. For no action is wisdom. For wisdom is a habit. And no action is a habit. The action, then, that arises from ignorance, is not already ignorance, but an evil through ignorance, but not ignorance. For neither perturbations of mind nor sins are vices, though proceeding from vice.