1 John 4:3

Every spirit that confesseth not that Jesus Christ is come in the flesh That doth not acknowledge him to be the true Messiah, as above observed, and that he came in that particular manner, though he might have come otherwise; is not of Gods “To determine whether the Socinian interpretation of the clause, hath come in the flesh, expresses the apostle's meaning, let that interpretation be substituted for the expression of which it is the interpretation, and the passages under consideration will run thus: 1 John 4:2, Every spirit, every teacher, calling himself inspired, who confesseth Jesus Christ hath come a mere man, is from God; 1 John 4:3, And every spirit who doth not confess Jesus Christ hath come a mere man, is not from God. Wherefore, as St. John is here giving marks by which true and false teachers were to be distinguished, if the Socinian sense of the phrase, hath come in the flesh, be just, he hath made it the mark of a true teacher, that he confesseth Jesus Christ as a mere man; and the mark of a false teacher, that he doth not confess Jesus Christ as a mere man, but affirmeth that he is more than a mere man; consequently, by so doing, St. John has condemned himself as a false teacher; because, having declared (1 John 4:15; 1Jn 5:5) that Jesus Christ is the Son of God, he hath confessed that he is more than a mere man.” And also in his gospel, having told us, (John 1:14,) that the Word (who he had said, 1 John 4:1, was with God and was God) was made flesh and dwelt among us, and they beheld his glory, the glory as of the only-begotten of the Father, “he hath certainly confessed that Jesus Christ is more than a mere man: for whose glory did the apostles behold, if it was not the glory of the Word made flesh, the only-begotten of the Father, full of grace and truth? Wherefore, John having confessed that Jesus is the only-begotten Son of God, he cannot be supposed to have branded those teachers as deceivers, who did not confess Jesus Christ to be a mere man, but affirmed him to be more than a man; because, by so doing, he would have condemned himself as a false teacher.” And this is that spirit of antichrist which ye have heard, &c. “From this, as well as from John 2:18, it appears that antichrist is not any particular person, nor any particular succession of persons in the church, but a general name for all false teachers in every age, who disseminate doctrines contrary to those taught by the apostles; especially if these doctrines have a tendency to derogate from Christ's character and actions as the Saviour of the world.” Macknight.