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 desirous of so setting before them the nature of religion, that they would continue to exercise faith in him. It is often one of the most important duties of ministers of the gospel, to present to real Christians such views of the nature, the claims, the evidences, and the hopes of religion, as shall be adapted to secure their perseverance in the faith. In the human heart, even when converted, there is such a proneness to unbelief; the religious affections so easily become cold; there are so many cares pertaining to the world that are suited to distract the mind; there are so many allurements of sin to draw the affections away from the Saviour; that there is need of being constantly reminded of the nature of religion, in order that the heart may not be wholly estranged from the Saviour. No small part of preaching, therefore, must consist of the re-statement of arguments with which the mind has been before fully convinced; of motives whose force has been once felt and acknowledged; and of the grounds of hope and peace and joy which have already, on former occasions, diffused comfort through the soul. It is not less important to keep the soul, than it is to "convert" it; to save it from coldness, and deadness, and formality, than it was to impart to it the elements of spiritual life at first. It may be as important to trim a vine, if one would have grapes, as it is to set it out; to keep a garden from being overrun with weeds in the summer, as it was to plant it in the spring.

That ye may know that ye have eternal life - I write to show your privileges - to lead you into this holy of holies - to show what believing on the Son of God is, by the glorious effects it produces: it is not a blind reliance for, but an actual enjoyment of, salvation; Christ living, working, and reigning in the heart.

And that ye may believe - That is, continue to believe: for Christ dwells in the heart only by Faith, and faith lives only by Love, and love continues only by Obedience; he who Believes loves, and he who Loves obeys. He who obeys loves; he who loves believes; he who believes has the witness in himself: he who has this witness has Christ in his heart, the hope of glory; and he who believes, loves, and obeys, has Christ in his heart, and is a man of prayer.

These things have I written unto you,.... 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 faith in him, and were baptized in his name, and continued believing in him, and holding fast their profession of him. The end of writing these things to them was,

that ye may know that ye have eternal life; that there is such a thing as eternal life; that this is in Christ; that believers have it in him, and the beginning of it in themselves; and that they have a right unto it, and meetness for it, and shall certainly enjoy it; the knowledge of which is had by faith, under the testimony of the Spirit of God, and particularly what is above written concerning eternal life, being a free grace gift of God; and this being in Christ, and the assurance of it, that such who have him, or believe in him, have that which might serve to communicate, cultivate, and increase such knowledge:

and that ye may believe on the name of the Son of God; which they had done already, and still did; the sense is, the above things were written to them concerning the Son of God, that they might be encouraged to continue believing in him, as such; to hold fast the faith of him and go on believing in him to the end; and that their faith in him might be increased; for faith is imperfect and is capable of increasing, and growing exceedingly: and nothing more tends unto, or is a more proper means of it, than the sacred writings, the reading and hearing them explained, and especially that part of them which respects the person, office, and grace of Christ. The Alexandrian copy, and one of Beza's manuscripts, the Vulgate Latin, Syriac, and Ethiopic versions, read, "these things have I written unto you, that ye may know that ye have eternal life, who believe in the name of the Son of God".

Have I written (ἔγραψα)

Lit., I wrote. John speaks as looking back over his Epistle and recalling the aim with which he wrote. See on 1 John 2:13.

May know (εἰδῆτε)

Not perceive (γινώσκειν), but know with settled and absolute knowledge. See on John 2:24.

Ye have eternal life (ζωὴν ἔχετε αἰώνιον)

The Greek order is peculiar, "ye may know that life ye have eternal." The adjective eternal is added as an after-thought. So Westcott: "that ye have life - yes, eternal life."

Unto you that believe

In the A.V., these words follow have I written. The Rev. follows the Greek order. The words, like eternal, above, are added as an after-thought, defining the character of the persons addressed.

On the name (εἰς τὸ ὄνομα)

See on John 2:23; see on John 1:12.

{13} These things have I written unto you that believe on the name of the Son of God; that ye may know that ye have eternal life, and that ye may believe on the name of the Son of God.

(13) The conclusion of the epistle, in which he shows first of all, that even they who already believe, need this doctrine, that they may grow more and more in faith: that is to say, that they may be daily more and more certain of their salvation in Christ, through faith.

5:13 These things have I written unto you. He writes that they may understand how they may know that they have eternal life. Tests have been given. For example, see 1Jo 5:1,2 4:13.

That ye may believe on the name of the Son of God. Put the fullest trust in the name of Christ.

5:13 These things have I written - In the introduction, 1John 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.

13. 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 1Jo 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 1Jo 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 1Jo 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" is the sure way to "joy in God."

5:13-17 Upon all this evidence, it is but right that we believe on the name of the Son of God. Believers have eternal life in the covenant of the gospel. Then let us thankfully receive the record of Scripture. Always abounding in the work of the Lord, knowing that our labour is not in vain in the Lord. The Lord Christ invites us to come to him in all circumstances, with our supplications and requests, notwithstanding the sin that besets us. Our prayers must always be offered in submission to the will of God. In some things they are speedily answered; in others they are granted in the best manner, though not as requested. We ought to pray for others, as well as for ourselves. There are sins that war against spiritual life in the soul, and the life above. We cannot pray that the sins of the impenitent and unbelieving should, while they are such, be forgiven them; or that mercy, which supposes the forgiveness of sins, should be granted to them, while they wilfully continue such. But we may pray for their repentance, for their being enriched with faith in Christ, and thereupon for all other saving mercies. We should pray for others, as well as for ourselves, beseeching the Lord to pardon and recover the fallen, as well as to relieve the tempted and afflicted. And let us be truly thankful that no sin, of which any one truly repents, is unto death.