What does 1 John 4:3 mean?
A second test John gives is related to confessing Christ as Lord. If a person confesses Jesus as Lord, he or she has publicly professed becoming a Christian (Romans 10:9). If a person refuses to confess Jesus is the Christ, that person cannot be a true believer. This also reflects back to verse 2 and the necessity to "confess" that Jesus has come in the flesh.John has harsh words for false teachers who do not confess Christ in these ways. He refers to this spirit as that of "antichrist." This is different from the world ruler described in the end times. John specifically notes that this is a spirit—and attitude—which was already working in the world of his readers.
The spirit of antichrist is a false teaching. This teaching promotes a phony godliness which exists apart from the biblical Jesus (2 Timothy 3:5). John also mentioned the antichrist previously in 1 John 2:18 and 1 John 2:22. In 2 John 1:7, he also writes, "For many deceivers have gone out into the world, those who do not confess the coming of Jesus Christ in the flesh. Such a one is the deceiver and the antichrist." Those who reject the humanity of Jesus are considered against Christ or antichrist.