NET

3 but every spirit that refuses to confess Jesus, that spirit is not from God, and this is the spirit of the antichrist, which you have heard is coming, and now is already in the world.

Darby

3 and every spirit which does not confess Jesus Christ come in flesh is not of God: and this is that [power] of the antichrist, [of] which ye have heard that it comes, and now it is already in the world.

KJV

3 And every spirit that confesseth not that Jesus Christ is come in the flesh is not of God: and this is that [spirit] of antichrist, whereof ye have heard that it should come; and even now already is it in the world.