1 John 5:7

There are three that give testimony in heaven: the Father, the Word, and the Holy Ghost; and these three are one: i.e. one in nature, in substance, and in all perfections, in the same sense as when Christ himself said, (John x. 30.) I and the Father are one, or one thing. The Socinians object that this verse is wanting in many Greek manuscripts; and even Erasmus in one edition, and Mr. Simon in his Critics, have questioned it, or rejected it, as a false reading, but without any sufficient proofs and grounds, as hath been shewn by many learned Catholics, and also by Protestant writers, who receive in their translations this verse as canonical. It is easy to account for the omission of this verse; for as both the seventh and eighth verse begin and end with the same words, this gave occasion to the oversight and omission of the transcribers, whereas it is not credible that such a whole verse could be added. And that it was only by the mistake and oversight of transcribers may further appear, because we find part of the seventh verse, to wit, and these three are one, cited by Tertullian, lib. contra Praxeam. chap. xxiii. p. 515. Ed. Rig. and twice by St. Cyprian, Epist. 73. ad Jubaianum. p. 125. Ed. Rig. in the Oxford Edition, p. 310. and in his Treatise de Unit. Ecclesiæ, p. 181. Ed. Rigal. and in the Oxford Ed. p. 79, where also Dr. Fell defends this verse of St. John to be genuine. Tertullian and St. Cyprian wrote long before the dispute with the Arians. The Socinians also object that this passage is not brought by St. Athanasius and some other fathers against the Arians, which they could scarce have omitted had they read this verse, but this only proves that this omission had happened in some manuscripts in their time, or, as some conjecture, that the Arians had corrupted some copies. St. Fulgentius made use of it against the Arians, and also others about that time. See the Benedictines of St. Maur against Mr. Simon, in the first tome of St. Jerome, p. 1670. Both Catholics and Protestants, after a diligent examination, have received this verse, which is found in the best manuscripts. See Greek Testament at Amsterdam, in the year 1711.[A.D. 1711.] The three divine Persons, who are present everywhere, though said to be in heaven, gave testimony concerning Christ. The Father by a voice from heaven, both at his baptism (Matthew iii. 17.) and at his transfiguration, (Matthew xvii. 5.) saying: "This is my beloved Son, in whom I am well pleased, hear ye him:" and also by all the miracles wrought by the same power of all the three divine Persons. 2. The Son testified to the Jews on many occasions, that he was sent from God, that he was the only Son of God, that he and his Father were one, &c. as in the annotations on John iii. The Holy Ghost confirmed the same, particularly by coming down upon the disciples on the day of Pentecost, and inspiring them to teach the same doctrine concerning Jesus Christ. (Witham)