¹ tn Or “they should naturally comprehend.” The present tense in this context may have a conative force.

sn They instinctively comprehend. Like irrational animals, these false teachers do grasp one thing – the instinctive behavior of animals in heat. R. Bauckham (Jude, 2 Peter [WBC], 63) notes that “Though they claim to be guided by special spiritual insight gained in heavenly revelations, they are in fact following the sexual instincts which they share with the animals.” Jude’s focus is somewhat different from Peter’s: Peter argued that, like irrational animals who are born to be caught and killed, these men will be destroyed when destroying others (2 Pet 2:12). Jude, however, does not mention the destruction of animals, just that these false teachers will be destroyed for mimicking them.

² tn Grk “against” (κατά [kata] + genitive). English usage is satisfied with “on” at this point, but the parallel is lost in the translation to some degree, for the end of v. 15 says that this judgment is meted out on these sinners because they spoke against him (κατά + genitive).

³ tn Or “soul.”

⁴ tn Grk “of all their works of ungodliness.” The adverb “thoroughly” is part of the following verb “have committed.” See note on verb “committed” later in this verse.

⁵ tn The verb in Greek does not simply mean “have committed,” but “have committed in an ungodly way.” The verb ἀσεβέω (asebew) is cognate to the noun ἀσέβεια (asebeia, “ungodliness”). There is no easy way to express this in English, since English does not have a single word that means the same thing. Nevertheless, the tenor of v. 15 is plainly seen, regardless of the translation.

⁶ sn An apparent quotation from 1 En. 1:9. There is some doubt as to whether Jude is actually quoting from the text of 1 Enoch; the text here in Jude differs in some respects from the extant text of this pseudepigraphic book. It is sometimes suggested that Jude may instead have been quoting from oral tradition which had roots older than the written text.