“Amen, amen dico tibi, quia quod scimus loquimur, et quod vidimus testamur, et testimonium nostrum non accipitis.”
“Verily, verily, I say unto thee, We speak that we do know, and testify that we have seen; and ye receive not our witness.”
“Truly, truly, I tell you, we speak of what we know, and we testify to what we have seen, and yet you people do not accept our testimony.”
“Most certainly I tell you, we speak that which we know, and testify of that which we have seen, and you don’t receive our witness.”
“Verily, verily, I say unto thee, We speak that which we know, and bear witness of that which we have seen; and ye receive not our witness.”
Our Saviour doth not so much wonder at as upbraid the ignorance of Nicodemus, and all of his sect, who went for masters, or teachers, and that in Israel; who had the law and the prophets, and yet were ignorant of those things which were necessary to be known to every ordinary person’s salvation. Will any say, But where was there any thing spoken in the books of the law and the prophets about regeneration, or a being born again? What other things could be meant by the circumcision of the heart, commanded by Moses, Deu 10:16, promised in Deu 30:6; by the new heart, and the new spirit, promised Eze 36:26; by the clean heart prayed for by David, Psa 51:10? A teacher in Israel should from hence have understood the necessity of a new and of a clean heart; but the whole sect of the Pharisees were so taken up with the trifles of the rites and traditions, and the works of the law, that as to these spiritual things of nearer and much higher concernment to people’s souls, they knew and spake little of them.
We speak what we know. It may perhaps be asked here, why Christ speaks in the plural number? To this we must answer, that it is the only Son of God, who is here speaking, showing us how the Father is in the Son, and the Son in the Father, and the Holy Ghost proceeding from both. (St. Thomas Aquinas)
[1.] That the truths Christ taught were very certain and what we may venture upon (v. 11): We speak that we do know. We; whom does he mean besides himself? Some understand it of those that bore witness to him and with him on earth, the prophets and John Baptist; they spoke what they knew, and had seen, and were themselves abundantly satisfied in: divine revelation carries its own proof along with it. Others of those that bore witness from heaven, the Father and the Holy Ghost; the Father was with him, the Spirit of the Lord was upon him; therefore he speaks in the plural number, as ch. 14 23: We will come unto him. Observe, First, That the truths of Christ are of undoubted certainty. We have all the reason in the world to be assured that the sayings of Christ are faithful sayings, and such as we may venture our souls upon; for he is not only a credible witness, who would not go about to deceive us, but a competent witness, who could not himself be deceived: We testify that we have seen. He spoke not upon hear-say, but upon the clearest evidence, and therefore with the greatest assurance. What he spoke of God, of the invisible world, of heaven and hell, of the divine will concerning us, and the counsels of peace, was what he knew, and had seen, for he was by him as one brought up with him, Prov 8 30. Whatever Christ spoke, he spoke of his own knowledge. Secondly, That the unbelief of sinners is greatly aggravated by the infallible certainty of the truths of Christ. The things are thus sure, thus clear; and yet you receive not our witness. Multitudes to be unbelievers of that which yet (so cogent are the motives of credibility) they cannot disbelieve!