“Even from your own number men will arise and distort the truth in order to draw away disciples after them.” Acts 20:30
Teachers are gifted. They can distort the truth, and do it effectively. The reason is to get Christians to follow them. Paul mentions another kind of teacher in Philippians 1:15-18.
“It is true that some preach Christ out of envy and rivalry, but others out of goodwill. The latter do so in love, knowing that I am put here for the defense of the gospel. The former preach Christ out of selfish ambition, not sincerely, supposing that they can stir up trouble for me while I am in chains. But what does it matter? The important thing is that in every way, whether from false motives or true, Christ is preached. And because of this I rejoice.” Philippians 1:15-18
Here are some additional motives, envy, riva…