3 and every spirit which does not confess Jesus is not of God: and this is the spirit of antichrist, which you have heard that he is coming; and now he is already in the world.
1 John 4:3 Cross References - Godbey
2 Thessalonians 2:3-8
3 Let no one deceive you in any way: because unless there may first be an apostasy and the man of lawlessness may be revealed, the son of perdition,
4 the one opposing and exalting himself above everything that is called God or divinity; so that he sits in the temple of God, showing himself off that he is God.
5 Do you not remember that still being with you, I told you these things?
6 And now you know that which hinders, that he should be revealed in his time.
7 For already the mystery of lawlessness is working: only there is one now hindering, until he may be taken out of the midst;
8 then indeed will the lawless one be revealed, whom the Lord Jesus will remove by the spirit of his mouth, and will exterminate by the brightness of his coming;
1 John 2:18
18 Little children, it is the last hour: and as you have heard that antichrist is coming, even now many antichrists have come, from which we know that it is the last hour.
1 John 2:22
22 Who is a liar except the one denying that Jesus is the Christ? This one is the antichrist, the one denying the Father and the Son.
2 John 1:7
7 Because many deceivers have gone out into the world, who do not confess that Jesus Christ is coming in the flesh; the same is the deceiver and the antichrist.