1 John 4:3

3 And every spirit who refuses to say this about Jesus is not from God. It is the spirit of the enemy of Christ, which you have heard is coming, and now he is already in the world.

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, many false prophets have gone out into the world. So do not believe every spirit, but test the spirits to see if they are from God.
2 This is how you can know God's Spirit: Every spirit who confesses that Jesus Christ came to earth as a human is from God.
3 And every spirit who refuses to say this about Jesus is not from God. It is the spirit of the enemy of Christ, which you have heard is coming, and now he is already in the world.
4 My dear children, you belong to God and have defeated them; because God's Spirit, who is in you, is greater than the devil, who is in the world.
5 And they belong to the world, so what they say is from the world, and the world listens to them.
Scripture taken from the New Century Version. Copyright © 1987, 1988, 1991 by Thomas Nelson, Inc. Used by permission. All rights reserved.