The Father loves the Son, and has given all things into his hand.
      First, As infallibly sure and certain, and to be entertained accordingly (John 3:32; John 3:32): What he hath seen and heard, that he testifieth. See here, 1. Christ's divine knowledge; he testified nothing but what he had seen and heard, what he was perfectly apprized of and thoroughly acquainted with. What he discovered of the divine nature and of the invisible world was what he had seen; what he revealed of the mind of God was what he had heard immediately from him, and not at second hand. The prophets testified what was made known to them in dreams and visions by the mediation of angels, but not what they had seen and heard. John was the crier's voice, that said, "Make room for the witness, and keep silence while the charge is given," but then leaves it to the witness to give in his testimony himself, and the judge to give the charge himself. The gospel of Christ is not a doubtful opinion, like an hypothesis or new notion in philosophy, which every one is at liberty to believe or not; but it is a revelation of the mind of God, which is of eternal truth in itself, and of infinite concern to us. 2. His divine grace and goodness: that which he had seen and heard he was pleased to make known to us, because he knew it nearly concerned us. What Paul had seen and heard in the third heavens he could not testify (2 Corinthians 12:4), but Christ knew how to utter what he had seen and heard. Christ's preaching is here called his testifying, to denote, (1.) The convincing evidence of it; it was not reported as news by hearsay, but it was testified as evidence given in court, with great caution and assurance. (2.) The affectionate earnestness of the delivery of it: it was testified with concern and importunity, as Acts 18:5.