To expose the false teachers' pride, Jude drew on a story from The Assumption of Moses. This non-biblical Jewish work adds to the story of Moses's burial (Deut. 34:5-6). In this story, the archangel Michael argued with the devil over possession of the body of Moses. Even Michael, a leader of the angels, did not presume to judge even the devil himself, who was clearly guilty of slander. Instead, he appealed to the authority of God. Michael the archangel is a leader of the angels. He guards God's people (Dan. 10:13, 21; 12:1), and he leads the armies of heaven against the devil (Rev. 12:7). The false teachers may have claimed a higher spiritual understanding. However, they were actually ignorant of spiritual things. The one thing they really "understood" was likely sexual desire. Their perversion will lead to their destruction in God's judgment.
The Ungodly Influence of False Teachers. - Jude 1:11-13
Jude added three more examples of ungodly lives (11). He then showed how such lives lead to ruin (12-13).
Examples of Ungodly Influence - Jude 1:11
Jude appealed to three famous examples from the OT of God's judgment on ungodly leaders and those they lead astray. Cain The first example of ungodly influence comes from the story of Cain, which is recorded in Gen. 4:3-12 (cf. Heb. 11:4; 1 John 3:12). In the book of Genesis, Cain stood at the head of a long line of unrepentant rebellion against God. To “walk in the way” of someone means to follow their example (1 Kgs. 15:26; 2 Kgs. 8:18; 2 Chron. 11:17). According to Jewish tradition, Cain also directly led others to sin, much like the false teachers (Josephus, Ant. 1.52–62; Posterity of Cain 38-39). Balaam’s error Jude mentions Balaam as second example of ungodly influence. In Num. 31:16, Balaam was associated with advising the Moabites to lead the Israelites into the sexual sin and idolatry of the Ba’al Peor incident (Num. 25:1-3). for profit In Deut. 23:4 and Neh. 13:2, Balaam performed his divination for money, and Jewish tradition implied that his advice to the Moabites (Num. 31:16) brought him personal gain. Korah’s rebellion The third example of ungodly influence comes from the story of Korah who was a Levite leader (Exod. 6:21). In Numbers 16, Korah led a rebellion against Moses and Aaron. This rebellion brought Korah, the other leaders, and 250 Israelite men into sudden divine judgment. Likewise, Jude indicated that God’s judgment will fall on those false teachers and on those whom they lead into error.
Application of Examples to False Teachers - Jude 1:12-13
Jude described the false teachers themselves. They may have appeared helpful, but like the previous examples, they only brought harm.
Blemishes - Jude 1:12
hidden reefs In later Greek, the word used here can refer to a "stain" or "blemish." Here, though, Jude referred to the unseen danger of obstacles hidden under seemingly safe water. Similarly, the false teachers were all the more dangerous for the church because they may have appeared helpful. love feasts These feasts are the most common early church meetings which consisted of both a common meal and an observance of the Lord's Supper (see 1 Cor. 11:20-34). feast . . . feed themselves The love feasts were times for the church to care for one another and to share prophecy and teaching (Acts 20:7, 11). So, Jude condemned the false teachers for serving themselves with their teaching rather than building up the community in truth. cloudswithout rain . . . treeswithout fruit These images, like hidden reefs, illustrate the deception of the false teachers, who may seem helpful but disappoint. twicedead Not only are the false teachers dead in the sense that they bear no fruit; they are also destined for ultimate destruction in divine judgment (cf. Matt. 7:16-20).