⁷ tn Heb “Make strong your loins,” an expression which could refer (1) to the practice of tucking the ends of the long cloak (outer garment) into the belt to shorten it in preparation for activities like running, fighting in battle, etc. (cf. NAB, NRSV “gird your loins”); (2) to preparing oneself physically for the onslaught of the enemy (cf. NASB “strengthen your back”); or (3) to a combination of mental and physical preparation for battle (cf. NIV “brace yourselves”).

⁴ sn The city of Susa was in an uproar. This final statement of v. 15 is a sad commentary on the pathetic disregard of despots for the human misery and suffering that they sometimes inflict on those who are helpless to resist their power. Here, while common people braced for the reckless loss of life and property that was about to begin, the perpetrators went about their mundane activities as though nothing of importance was happening.

² sn In this translation, Jude is stressing that the readers have been informed once for all of the OT illustrations he is about to mention. Where would they get this information? Most likely from having read 2 Peter. Earlier Jude used the same adverb to indicate that these believers had a written record of the faith. This seems to be his implication here, too. Thus, for the second time Jude is appealing to the written documents of the early church as authoritative as opposed to the messages of the false teachers. As the 1st century began to draw to a close, the early church found itself increasingly dependent on the letters and gospels of the apostles and their associates. Once those apostles died, false apostles and false teachers sprang up, like wolves in sheep’s clothing (cf. Acts 20:29-30). To combat this, some of the latest books of the NT stressed the authority of what had been written (so Hebrews, Jude, Ephesians, 1 John). Although these writers anticipated the return of the Lord, they also braced their audiences for a delay of the parousia (the second coming of Christ) by suggesting that when they were gone the NT documents should guide them.