²¹ You may say to yourselves, “How can we know when a message has not been spoken by the Lord?”

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)

²⁴ The one who calls^(A) you is faithful,^(B) and he will do it.^(C)