II John 10-11 If someone comes to your meeting and does not teach the truth about Christ, don’t invite him into your house or encourage him in any way. Anyone who encourages him becomes a partner in his evil work.
We need to be aware of those who would teach things in Jesus’ name that are not Biblically sound and true. We need to be knowledgeable enough about the truth that we can tell when someone is preaching or teaching another gospel. We need to examine the Scriptures and think for ourselves to discern whether or not what we hear is the truth. God gave us brains to use and we should use them. Don’t let others do your thinking for you.
When we encounter those who are not proclaiming Biblical truth, we should not entertain them or encourage them in any way. We should point out the truth in a loving way to them and not let them get by with false teaching. If their hearts are right with God, they will change their ways of thinking and proclaim the truth. If they have rebellious hearts, they will not change and we are not to have fellowship with them. If we fail to expose false teachings we are in essence supporting the false teachers. We are telling them and others that what they are saying is okay and we become partners with them in their false teachings.
We must stand guard over the truth at all times. We are protectors of the integrity of the Gospel message and God holds us accountable when we fail to do our job of exposing false teachers and their teachings. This means as well when godly teachers and preachers say things that don’t ring true with the Word, we must bring it to their attention and expose that which is false in order to prevent them from leading others astray. If they fail to listen, have nothing more to do with them except pray for them and those they expose to their false teachings.