10. Corresponds to 2Pe 2:12 but in that place is differently turned. Here φυσικῶς means by instinct: and it is said of the false teachers that they come to ruin (φθείρονται) by means of the knowledge—and that a contemptible sort of knowledge—which they possess, while they speak evil of what they do not understand—perhaps primarily of the spiritual world—δόξας βλασφημοῦσιν Jud 1:8.