²² Who is the liar? It is whoever denies that Jesus is the Christ. Such a person is the antichrist—denying the Father and the Son.^(A)

On Denying the Incarnation

4 Dear friends,^(A) do not believe every spirit,^(B) but test the spirits to see whether they are from God, because many false prophets have gone out into the world.^{(C) 2} This is how you can recognize the Spirit of God: Every spirit that acknowledges that Jesus Christ has come in the flesh^(D) is from God,^{(E) 3} but every spirit that does not acknowledge Jesus is not from God. This is the spirit of the antichrist,^(F) which you have heard is coming and even now is already in the world.^(G)

⁹ This is how God showed his love among us: He sent his one and only Son^(A) into the world that we might live through him.^{(B) 10} This is love: not that we loved God, but that he loved us^(C) and sent his Son as an atoning sacrifice for our sins.^(D)