20. after they—the seducers "themselves" have escaped (2Pe 2:19; see on Heb 6:4-6).
pollutions—which bring "corruption" (2Pe 2:19).
through—Greek, "in."
knowledge—Greek, "full and accurate knowledge."
the Lord and Saviour Jesus Christ—solemnly expressing in full the great and gracious One from whom they fall.
latter end is worse … than the beginning—Peter remembers Christ's words. "Worse" stands opposed to "better" (2Pe 2:21).