What does 2 Timothy 3:9 mean?
Paul ends this section condemning the ungodliness of false teachers on a more uplifting note, at least for true believers. Regardless of the efforts, and even the temporary success, of false teachers, they will not succeed for long. Paul also explains why: Those who live sinful lives will eventually be discovered (Numbers 32:23).Referring again to Jannes and Jambres (2 Timothy 3:8), Paul concludes that the fate of false teachers will be the same. Jannes and Jambres were, according to Jewish tradition, the names of two leading magicians of Pharaoh. These were the men who opposed Moses when he followed God's command to tell Pharaoh to let the Jewish people go free from slavery. Though they were able to reproduce the signs of Moses at first (Exodus 7:11–12, 22; 8:7), they eventually could not (Exodus 8:18; 9:11). Everyone knew their power had been surpassed by the God of Moses.
Despite early, superficial success, a false teacher will eventually be exposed for who and what he is. The same would be true of those who opposed Timothy through false teachings.