That there are false prophets and false teachers today should come as no surprise to us, for we are warned about them throughout the NT, including here in 1 John 4:2-3.
III. False Christianity fails to magnify either the deity of Christ or His humanity, or both. (1 John 4:3a)
IV. False teaching about Jesus Christ places one in league with the devil. (1 John 4:3b)