1 John 5:13

These things have I written unto you, that ye may know that ye have eternal life, even unto you that believe on the name of the Son of God.

These things have I written ... This has reference to the epistle. At the beginning of the letter, John explained the purpose of his writing thus, "These things we write, that our joy may be made full" (1 John 1:4); but the meaning is closely related to this. Their joy (both John's and that of his readers) would be made full in the certain knowledge of the possession of eternal life.

Unto you who believe on the name ... "This is the only place in the whole letter where he speaks of believing on the name, in His full Person, all that the name stands for."[17] This variation, however, conveys no different meaning, really, from that of believing in Christ, or believing on Christ.

With this verse, the final section of 1John begins.