What does Jude 1:12 mean?
Jude has been condemning the spiritual errors of apostates, who are bringing false teachings into the church. The prior verse described particular sins, as exemplified by other figures in Scripture. Here, he continues by explaining how those sins will eventually lead these rebellious ones into disaster.Jude describes the apostates as "hidden reefs at your love feasts, as they feast with you without fear." The early church held feasts that celebrated the believers' mutual love. Probably, the love feast was held before the communion service. Somehow, the false teachers had mingled with the believers at the love feasts, but they were stains on otherwise beautiful occasions. Like a coral reef concealed under the water can catch a boat off guard, sinking it, the presence of these false teachers was a spiritual danger to those around them.
Jude points to the false shepherds' self-indulgence by saying they feed only themselves. Jesus depicted a false shepherd as not caring for the sheep. He says a false shepherd abandons the flock when the wolf approaches (John 10:12–13). False teachers appear to be legitimate ministers, but this is only a disguise. They put on the role of ministers of light in order to practice evil and achieve personal gain. Paul, also, exposes these men as "deceitful workmen, disguising themselves as apostles of Christ. And no wonder, for even Satan disguises himself as an angel of light" (2 Corinthians 11:13–14). Paul further writes in Philippians 3:19 that false teachers are absorbed with earthly things.
Jude further compares the false teachers to wind-blown clouds that give no rain. Just as people living in a dry climate long for clouds to bring water to the earth, even so thirsty people looked in vain to the false teachers for spiritual nourishment. However, the false teachers did not carry the water of life—the Word of God. Jude accuses the false teachers of being barren trees with dead roots, unlike true believers that bear the fruit of the Spirit. The Holy Spirit produces godly characteristics in those who walk in the truth (Galatians 5:22–23).