Verse 9. - An argument a fortiori. If we receive expresses no doubt, but states an admitted fact gently (see 1 John 4:11; and comp. John 7:23; John 10:35; John 13:14). "If we accept human witness [and, of course, we do], we must accept Divine witness [and, therefore, must believe that the Son of God is Jesus Christ]; for the witness of God consists in this, that he has borne witness concerning his Son." Note the pertinacious repetition of the word "witness," thoroughly in St John's style. The perfect μεμαρτύρηκε indicates that the witness still continues.

5:9-12 Nothing can be more absurd than the conduct of those who doubt as to the truth of Christianity, while in the common affairs of life they do not hesitate to proceed on human testimony, and would deem any one out of his senses who declined to do so. The real Christian has seen his guilt and misery, and his need of such a Saviour. He has seen the suitableness of such a Saviour to all his spiritual wants and circumstances. He has found and felt the power of the word and doctrine of Christ, humbling, healing, quickening, and comforting his soul. He has a new disposition, and new delights, and is not the man that he formerly was. Yet he finds still a conflict with himself, with sin, with the flesh, the world, and wicked powers. But he finds such strength from faith in Christ, that he can overcome the world, and travel on towards a better. Such assurance has the gospel believer: he has a witness in himself, which puts the matter out of doubt with him, except in hours of darkness or conflict; but he cannot be argued out of his belief in the leading truths of the gospel. Here is what makes the unbeliever's sin so awful; the sin of unbelief. He gives God the lie; because he believes not the record that God gave of his Son. It is in vain for a man to plead that he believes the testimony of God in other things, while he rejects it in this. He that refuses to trust and honour Christ as the Son of God, who disdains to submit to his teaching as Prophet, to rely on his atonement and intercession as High Priest, or to obey him as King, is dead in sin, under condemnation; nor will any outward morality, learning, forms, notions, or confidences avail him.If we receive the witness of men,.... The witness of a sufficient number of credible men, of men of good character and report, is always admitted in any case, and in any court of judicature; it was allowed of in the law of Moses; everything was proved and established hereby; upon this men were justified or condemned, cognizance was taken of men's sins, and punishment inflicted, yea, death itself, Deuteronomy 17:6; and even in this case concerning the Son of God, his coming into the world, and the dignity of his person, the testimony of men is credited; as that of the wise men, who declared that the King of the Jews was born, and his star had been seen in the east, which Herod himself gave credit to, and upon it summoned the chief priests, and inquired of them where he should be born; and also of the shepherds, who testified to the appearance of angels, who told them that there was then born a Saviour, which is Christ the Lord, and who also related that they themselves saw the infant at Bethlehem; and especially of John the Baptist, whose testimony was true, and could not be objected to by the Jews themselves, who sent to him, before whom he bore a plain and faithful witness. Now if an human testimony may be, and is received,

the testimony of God is greater; more valuable, surer, and to be more firmly depended on, since it must be infallible; for God can neither deceive, nor be deceived:

for this is the witness of God, which he hath testified of his Son; even the witness of the Spirit, the water, and the blood, is the testimony, not of men, but of God; the Gospel, attended with the Spirit of God, is the testimony of God; and so the ordinances of baptism and the Lord's supper, which bear witness of Christ, are not of men, but of God; and especially the witness of the Father, the Word, and the Spirit, must be the testimony of God, since, though three persons, they are one God; particularly the witness which God the Father testified of his Son Jesus Christ at his baptism and transfiguration, must be allowed to be the testimony of God, and far greater than any human testimony, and therefore to be received.