1 John 4:14

“And we have seen, and do testify, &c.] This seems to be particularly said of the apostles, who had a clear discerning of the love and grace of God, manifested in the mission of Christ into the world; for though no man had seen his nature and his person, yet they had seen his love, and the exceeding riches of his grace, which he had shown forth in Christ Jesus; and they had also seen Christ, God manifest in the flesh; they had seen his glory, as the glory of the only begotten of the Father; they had seen him with their bodily eyes; they had seen his works and miracles; they had seen him dying and risen again from the dead, and go up to heaven; they were witnesses, and eyewitnesses of him, and…”

“And we--primarily, we apostles, Christ's appointed eye-witnesses to testify to the facts concerning Him. The internal evidence of the indwelling Spirit (Jo1 4:13) is corroborated by the external evidence of the eye-witnesses to the fact of the Father having "sent His Son to be the Saviour of the world." seen--Greek, "contemplated," "attentively beheld" (see on Jo1 1:1). sent--Greek, "hath sent": not an entirely past fact (aorist), but one of which the effects continue (perfect tense).”

“And we have seen - Notes on 1 John 1:1. And do testify - Notes, 1 John 1:3. That is, we who are apostles bear witness to you of this great truth, that God has sent his Son to be a Saviour. Compare the notes at John 20:31. The reason why this is referred to here is not quite apparent, but the train of thought in this passage would seem to be this: The writer is discoursing of the love of God, and of its manifestation in the gift of the Saviour, and of the proper influence which it should have on us. Struck with the greatness and importance of the subject, his mind adverts to the “evidence” on which what he was saying rested - the evidence that the Father had really thus manifested his love.…”

“And in consequence of this we have seen and testify that the Father sent the Son - These are the foundation and the criteria of our abiding in God and God in us, the communion of the Spirit, and the confession of the Son. 1 John 4:15”

“we have: Jo1 1:1-3, Jo1 5:9; Joh 1:14, Joh 3:11, Joh 3:32, Joh 5:39, Joh 15:26, Joh 15:27; Act 18:5; Pe1 5:12 the Father: Jo1 4:10; Joh 3:34, Joh 5:36, Joh 5:37, Joh 10:36 the Saviour: Jo1 2:1, Jo1 2:2; Joh 1:29, Joh 3:16, Joh 3:17, Joh 4:42, Joh 12:47 1 John 4:15”