And no marvel; for Satan himself is transformed into an angel of light.
All Commentaries on 2 Corinthians 11:14 Go To 2 Corinthians 11
Augustine of Hippo
AD 430
So powerful is the attraction of the virtue of purity that practically every human being is pleased to hear it praised, and no one is so sunk in depravity as to have lost all sense of decency. Hence, unless the malignity of the demons somewhere “transforms itself into an angel of light,” as we read in our Scripture, it cannot carry out its business of deception.