1 John 4:2 - Matthew Poole's English Annotations on the Holy Bible

He here gives them the general rule, both affirmative and negative, which would suffice them to judge by in their present case; this being the great controversy of that time with the Jews: Whether Jesus were the Messiah? And whether the Messiah were as yet come or no? And with the Gnostics: Whether he were really come in the flesh, in true human nature? Or were not, as to that appearance, a mere phantasm? And he affirms: They that confessed him so come, were of God; i.e. thus far they were in the right, this truth was of God. Of the two litigating parties, this was of God, the other not of God; this took his side, that was against him. Yea, and they that not only made this true confession, but did also truly confess him, i.e. sincerely, cordially, practically, so as accordingly to trust in him, subject and devote themselves to him, were born of God, his very children, acted and influenced hereunto by his own Holy Spirit, as 1 John 5:1,5 Mt 16:16,17 1 Corinthians 12:3.