And this is that spirit of Antichrist The Apostle added this, to render more detestable the impostures which lead us away from Christ. We have already said that the doctrine respecting the kingdom of Antichrist was well known; so that the faithful had been warned as to the future scattering of the Church, in order that they might exercise vigilance. Justly then did they dread the name as something base and ominous. The Apostle says now, that all those who depreciated Christ were members of that kingdom. And he says that the spirit of antichrist would come, and that it was already in the world, but in a different sense. He means that it was already in the world, because it carried on in secret its iniquity. As, however, the truth of God had not as yet been subverted by false and spurious dogmas, as superstition had not as yet prevailed in corrupting the worship of God, as the world had not as yet perfidiously departed from Christ, as tyranny, opposed to the kingdom of Christ, had not as yet openly exalted itself, he therefore says, that it would come.

And every spirit that confesseth not - That is, this doctrine is essential to the Christian system; and he who does not hold it cannot be regarded either as a Christian, or recognised as a Christian teacher. If he was not a man, then all that occurred in his life, in Gethsemane, and on the cross, was in "appearance" only, and was assumed only to delude the senses. There were no real sufferings; there was no shedding of blood; there was no death on the cross; and, of course, there was no atonement. A mere show, an appearance assumed, a vision, could not make atonement for sin; and a denial, therefore, of the doctrine that the Son of God had come in the flesh, was in fact a denial of the doctrine of expiation for sin. The Latin Vulgate here reads "qui solvit Jesum," "who dissolves or divides Jesus;" and Socrates (H. E. vii. 32) says that in the old copies of the New Testament it is written ὅ λίει τὸν Ἱησοῦν ho liei ton Hiēsoun, "who dissolves or divides Jesus;" that is, who "separates" his true nature or person, or who supposes that there were "two" Christs, one in appearance, and one in reality. This reading was early found in some manuscripts, and is referred to by many of the Fathers, (see Wetstein,) but it has no real authority, and was evidently introduced, perhaps at first from a marginal note, to oppose the prevailing errors of the times. The common reading, "who confesseth not," is found in all the Greek manuscripts, in the Syriac versions, in the Arabic; and, as Lucke says, the other reading is manifestly of Latin origin. The common reading in the text is that which is sustained by authority, and is entirely in accordance with the manner of John.
And this is that spirit of antichrist - This is one of the things which characterize antichrist. John here refers not to an individual who should be known as antichrist, but to a class of persons. This does not, however, forbid the idea that there might be some one individual, or a succession of persons in the church, to whom the name might be applied by way of eminence. See the notes at 1-John 2:18. Compare the notes at 2-Thessalonians 2:3 ff.
Whereof ye have heard that it should come - See the notes at 1-John 2:18.

Every spirit - Every teacher, that confesseth not Jesus, is not of God - has not been inspired by God. The words εν σαρκι εληλυθοτα, is come in the flesh, are wanting in AB, several others, both the Syriac, the Polyglot Arabic, Ethiopic, Coptic, Armenian, and Vulgate; in Origen, Cyril, Theodoret, Irenaeus, and others. Griesbach has left them out of the text.
Spirit of antichrist - All the opponents of Christ's incarnation, and consequently of his passion, death, and resurrection, and the benefits to be derived from them.
Ye have heard that it should come - See 2-Thessalonians 2:7.
Even now already is it in the world - Is working powerfully both among the Jews and Gentiles.

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.

confesseth not that Jesus Christ is come in the flesh--IRENÆUS [3.8], LUCIFER, ORIGEN, on Matthew 25:14, and Vulgate read, "Every spirit which destroys (sets aside, or does away with) Jesus (Christ)." CYPRIAN and POLYCARP support English Version text. The oldest extant manuscripts, which are, however, centuries after POLYCARP, read, "Every spirit that confesseth not (that is, refuses to confess) Jesus" (in His person, and all His offices and divinity), omitting "is come in the flesh."
ye have heard--from your Christian teachers.
already is it in the world--in the person of the false prophets (1-John 4:1).

Ye have heard - From our Lord and us, that it cometh.