Joseph Benson's Commentary of the Old and New Testaments - 1 John 4:2
1 John 4:2 . Hereby By the following plain mark; know ye the Spirit of God In a teacher. Every spirit Of a teacher; that confesseth that Jesus Christ is come in the flesh, is of God Doddridge, with many other commentators, reads this clause, Every spirit that confesseth Jesus Christ, who is come in the flesh, is of God: that is, that confesseth him to be the Messiah, the Son of God, the Saviour of the world, and that both with heart and voice, sincerely believing him to be such, and... read more
Albert Barnes' Notes on the Whole Bible - 1 John 4:2
Hereby - Greek, “By this;” that is, by the test which is immediately specified.Know ye the Spirit of God - You may discern who are actuated by the Spirit of God.Every spirit - Everyone professing to be under the influence of the Spirit of God. The apostle uses the word “spirit” here with reference to the person who made the claim, on the supposition that everyone professing to be a religious teacher was animated by some spirit or foreign influence, good or bad. If the Spirit of God influenced... read more