Matthew Poole and continuators on 1 John 4:3

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 .

But on the contrary, concerning them who against so plain Evidence denied him to be so come; the Case was plain, as with the Jews, Iohn 8.24. And with the present Hereticks, who denying the true Manner, could not but deny the true End of his coming; and who also liv'd so impure Lives, as imported the most open Opposition and Hostility thereto, and so discovered most evidently that Antichristian Spirit, which it was foreknown would shew it self in the World.

Marginal references: Chap. 2.22. 2 John 7.; 2 Thess. 2.7. Chap. 2.18, 22.