“But you belong to God, my dear children. You have already won a victory over those people, because the Spirit who lives in you is greater than the spirit who lives in the world. Those people belong to this world, so they speak from the world’s viewpoint, and the world listens to them. But we belong to God, and those who know God listen to us. If they do not belong to God, they do not listen to us. That is how we know if someone has the Spirit of truth or the spirit of deception.”
1 John 4:4-6 NLT
Be vigilant, in a conversation listen to the other person. If a believer disagrees with you there not deceivers of the world, there just simple beings of Christ. Now if a person who rejects Christ then they are of the world, they are deceivers. So be carful fellow believers of people who disagree with you. Listen to them and pay attention to what there disagreeing on. So stay vigilant and stand in truth.