2John1:10 If anyone comes to your meeting and does not teach the truth about Christ, don't invite that person into your home or give any kind of encouragement. NLT
In my 100level, a brother got some folks confused. He was a Brahamite. William Braham was the man that started preaching about Satan having sex with Eve to give birth to Cain. He made his own disciples and preached that heretic sermon all around school a great deal. One of their beliefs is that hell isn't forever as against what's in the bible.
There is a need for every believer to know the truth of God's word and disallow any heretic preacher from swerving them off from the way of truth. There are some heretic evangelists that knocks on the door people's homes, they dress well and carry a bag of tract and publications all around, I don't allow them neither do I give them a talking chance.
Heresy sounds interesting to the flesh and it pleases carnal cravings. Imagine that a brother that has been battling with lust hearing a message that says a kiss with your fiance isn't a bad idea, is that not giving his carnal cravings a boost? God's word is saying that you shouldn't invite heretics into your home neither should you encourage them.
You need to align yourself with the truth to discern heresy.
Father, deliver your church from Satanuic preachers In Jesus Name. Amen.