3 And every spirit which acknowledges not Jesus Christ having come in the flesh is not of God: and this is that of antichrist which ye have heard comes; and now is already in the world.
1 John 4:3 Cross References - JuliaSmith
2 Thessalonians 2:3-8
3 Let none deceive you in any manner: for, except an apostasy come first, and the man of sin be revealed, the son of perdition;
4 Who being opposed and lifted up above all called God, or which is worshipped; so that he as God sits in the temple of God, showing himself that he is God.
5 Remember ye not, that, yet being with you, I spake these to you
6 And now ye know the withholding for him to be revealed in his time.
7 For the mystery of iniquity is already energetic: only he withholding, even till he be out of the midst.
8 And then shall the Lawless one be revealed, whom the Lord will destroy with the spirit of his mouth, and leave unemployed in the splendor of his arrival:
1 John 2:18
18 Young children, it is the last hour: and as ye have heard that antichrist comes, and now many antichrists have come; whence we know that it is the last hour.
1 John 2:22
22 Who is a liar if not he denying that Jesus is the Christ? He is antichrist, denying the Father and the Son.
2 John 1:7
7 For many cheats come into the world, they not acknowledging Jesus Christ coming in the flesh. This is the cheat and antichrist.