Jude 1:22

οὓς μὲν ἐλέγχετε διακρινομένους. A. V. reads διακρινόμενοι and translates “making a difference” which is only correct as a rendering of διακρίνοντες. διακρινόμενος in James 1:6 means “wavering, doubting,” and this gives a good sense here. “Some you must convince when they are wavering.” The alternative rendering is “when they dispute with you,” and this has support from Jude 1:9 of this Epistle.

οὓς δὲ σώζετε ἐκ πυρὸς ἁρπάζοντες. The idea is that of a brand plucked out of the burning, which occurs in Amos 4:11 (coupled with a reference to Sodom and Gomorrah: cf. Jude 1:7) and also in Zechariah 3:2 of the High Priest Joshua (cf. Jude 1:9, where the words ἐπιτιμήσαι σοι Κύριος are taken by Westcott and Hort as referring to the same verse in Zech.).