False teachers are in the Church. This we know. How can they be discovered? Their fruits give them away. Read the Bible and God will reveal to you the rotten fruit of false teachers.
And through covetousness shall they with feigned words make merchandise of you: whose judgment now of a long time lingereth not, and their damnation slumbereth not. 2 Peter 2:3
A lot of times, we think "make merchandise of you" means they make money off of you. But what about using you for their own schemes? They could be using you for their personal gain: you become a commodity, a thing they have bought and now use however they want. And they do this through "feigned words". This means not only fake, but strategically designed. In other words, through their strategically smoothe talk, they've made you into something like a toy robot.
Maybe you wanted to be their friend. Maybe they're popular. Maybe you've sacrificed everything so that every one can see you around them.
Run away from them! Repent! Run to Jesus! Read the Bible and follow God's word!
(Here's the uplifting part.)
But there were false prophets also among the people, even as there shall be false teachers among you, who privily shall bring in damnable heresies, even denying the Lord that bought them, and bring upon themselves swift destruction. 2 Peter 2:1
It may look like the false teacher is following the Lord, but they speak heresy.
Their destruction will be swift and because it's from the Lord and not man, it will be righteous and tailored to the crime.
God's word never changes!