2 John !:7 For many deceivers are entered into the world, who confess not that Jesus Christ is come in the flesh. This is a deceiver and an antichrist.
This verse has a message in it that as a Christian we need to pay close attention to. John here lets us know that there are people out there that do not believe that Jesus ever walked on this earth. Satan is at the front of this attack and since he comes as an angel of light believers must be on guard against error by having an intimate acquaintance with the truth. A biblical Christology maintains that Jesus Christ’s nature was both fully God and fully man with all the implications for the fulfillment of redemptive purposes. All false religions, cults and heresies deny the true nature of Jesus Christ. These deceivers are probably leaders with a false doctrine who are trying to lead others astray. A “deceiver” would be pretending to be a Christian, when in reality, he is opposed to God.
Anyone who does not believe Jesus to be Messiah, and in fact, believes that Jesus was not God manifest in the flesh, is of the spirit of the Antichrist. They are opposed to the truth of Christ. With all that Satan can throw at us we need to be prepared know the truth and able to spot deceivers before they have a chance to change our beliefs.