1 John 4:3

3 But anyone who denies this about Jesus does not have the Spirit from God. The spirit that he has is from the Enemy of Christ; you heard that it would come, and now it is here in the world already.

1 John 4:3 Meaning and Commentary

1 John 4:3

And every spirit that confesseth not
The proper deity and sonship of Christ, his true and real humanity, and his Messiahship; or any of his offices, doctrines, and ordinances; or his satisfaction and righteousness; or that peace, pardon, justification, life, and salvation, are by him; all which are meant by what follows,

that Jesus Christ is come in the flesh:
this clause is left out in the Ethiopic version, and that without hurting the sense, since it is easily supplied from the preceding verse; and the Alexandrian copy, and the Vulgate Latin version, only read "Jesus": and the latter reads the whole thus, "and every spirit that dissolves Jesus"; that separates the two natures, human and divine, in him, and makes two persons of them; or denies either of them, either that he is truly God, or really man, or denies him to be Jesus, the Saviour; who, as much as in him lies, destroys his person, office, and work, and makes void his obedience, sufferings, and death:

is not of God;
neither he nor his doctrine are of God; his doctrine cannot come from God, being contrary to the word of God; and he himself is neither born of God, nor on his side.

And this is that [spirit] of antichrist:
who is against Christ, or opposes himself to him; as he who denies his sonship, his deity, his humanity, his offices, and his grace, manifestly does; every doctrine that is calculated against these truths is the spirit and doctrine of antichrist:

whereof you have heard that it should come, and even now already is
it the world;
in the false teachers, the forerunners of antichrist; (See Gill on 1 John 2:18).

1 John 4:3 In-Context

1 My dear friends, do not believe all who claim to have the Spirit, but test them to find out if the spirit they have comes from God. For many false prophets have gone out everywhere.
2 This is how you will be able to know whether it is God's Spirit: anyone who acknowledges that Jesus Christ came as a human being has the Spirit who comes from God.
3 But anyone who denies this about Jesus does not have the Spirit from God. The spirit that he has is from the Enemy of Christ; you heard that it would come, and now it is here in the world already.
4 But you belong to God, my children, and have defeated the false prophets, because the Spirit who is in you is more powerful than the spirit in those who belong to the world.
5 Those false prophets speak about matters of the world, and the world listens to them because they belong to the world.
Scripture taken from the Good News Translation - Second Edition, Copyright 1992 by American Bible Society. Used by Permission.