1 John 5:13

“These things have I written unto you, &c.] Which are contained in the epistle in general, and particularly what is written in the context, concerning the victory of the world, being ascribed to him who believes that Christ is the Son of God; and concerning the six witnesses of his sonship, and the record bore by God, that the gift of eternal life is in him: and which are especially written to them, that believe on the name of the Son of God; who not only believed that Christ is the Son of God, which this six fold testimony would confirm them in, but also believed in his name for righteousness, life, and salvation; in which name there is all this, and in no other; and who also professed their…”

“The oldest manuscripts and versions read, "These things have I written unto you [omitting 'that believe on the name of the Son of God'] that ye may know that ye have eternal life (compare Jo1 5:11), THOSE (of you I mean) WHO believe (not as English Version reads, 'and that ye may believe') on the name of the Son of God." English Version, in the latter clause, will mean, "that ye may continue to believe," &c. (compare Jo1 5:12). These things--This Epistle. He, towards the close of his Gospel (Joh 20:30-31), wrote similarly, stating his purpose in having written. In Jo1 1:4 he states the object of his writing this Epistle to be, "that your joy may be full." To "know that we have eternal life"…”

“These things have I written unto you - The things in this Epistle respecting the testimony borne to the Lord Jesus. That believe on the name of the Son of God - To believe on his name, is to believe on himself - the word “name” often being used to denote the person. See the notes at Matthew 28:19. That ye may know that ye have eternal life - That you may see the evidence that eternal life has been provided, and that you may be able, by self-examination, to determine whether you possess it. Compare the notes at John 20:31. And that ye may believe ... - That you may continue to believe, or may persevere in believing. He was assured that they actually did believe on him then; but he was…”

“These things have I written - In the introduction, Jo1 1:4, he said, I write: now, in the close, I have written. That ye may know - With a fuller and stronger assurance, that ye have eternal life. 1 John 5:14”

“have I: Jo1 1:4, Jo1 2:1, Jo1 2:13, Jo1 2:14, Jo1 2:21, Jo1 2:26; Joh 20:31, Joh 21:24; Pe1 5:12 believe: Jo1 3:23; Joh 1:12, Joh 2:23, Joh 3:18; Act 3:16, Act 4:12; Ti1 1:15, Ti1 1:16 ye may know: Jo1 5:10, Jo1 1:1, Jo1 1:2; Rom 8:15-17; Co2 5:1; Gal 4:6; Pe2 1:10, Pe2 1:11 1 John 5:14”