the Spirit, the water, and the blood—and these three are in agreement.
agree in one--"tend unto one result"; their agreeing testimony to Jesus' Sonship and Messiahship they give by the sacramental grace in the water of baptism, received by the penitent believer, by the atoning efficacy of His blood, and by the internal witness of His Spirit (Jo1 5:10): answering to the testimony given to Jesus' Sonship and Messiahship by His baptism, His crucifixion, and the Spirit's...
And there are three that bear witness on earth,.... To the same truth of the sonship of Christ: the Spirit, and the water, and the blood; by the "Spirit" is not meant the human Spirit or soul of Christ; for however that may be a witness of the truth of his human nature, yet not of his divine sonship: and moreover cannot be said to...
The faith of the Christian believer (or the believer in Christ) being thus mighty and victorious, it had need to be well founded, to be furnished with unquestionable celestial evidence concerning the divine mission, authority, and office of the Lord Jesus; and it is so; he brings his credentials along with him, and he brings them in a way by which he came and in the witness that attends him.
Commenting on 1 John 5:6-9