A pastoral message to a divided community: God is light and God is love, and those who know him walk in the light, love one another and confess that Jesus came in the flesh.
The letter opens with witness to “That which was from the beginning, that which we have heard, that which we have seen with our eyes” (1:1), an echo of the start of John’s Gospel. It has no greeting, no named author or readers, and no farewell. It circles through a few themes, returning to each from a new angle: “God is light, and in him is no darkness at all” (1:5); those who say they have no sin deceive themselves (1:8); and God’s children keep his commandments, above all the command to love one another.
Behind the letter is a split. Some have left the community, and the letter says of them, “They went out from us, but they didn’t belong to us” (2:19). The letter calls them antichrists and gives tests for telling truth from error. The chief test is whether a person confesses “that Jesus Christ has come in the flesh” (4:2). Its best-known words come in chapter 4, “God is love” (4:8) and “We love him, because he first loved us” (4:19). It ends by stating its aim, “that you may know that you have eternal life” (5:13).
The letter does not name its author, who writes as one of a group of eyewitnesses and addresses his readers as “My little children” (2:1).
From the 2nd century, with Irenaeus (bishop of Lyon) and others, the church credited this letter to John the apostle, the author of the Gospel of John, writing late in life at Ephesus. Its language and themes are very close to the Gospel’s: light and darkness, truth, remaining in God, love and eternal life.
Many academic scholars assign the letter to a member of the community that produced the Gospel, but not to the Gospel’s author. He may be the same person as the writer of 2 and 3 John, who calls himself the elder. They read it as written after the Gospel, in a dispute over how the Gospel should be understood.
Both views tie the three letters of John closely to the Gospel of John, and read 1 John as a response to people who had left the community over their view of Jesus.
The readers are believers the writer knows well, probably a group of house churches in one region; tradition places them in and around Ephesus. They had been shaken by the departure of members who seem to have denied that Jesus Christ had come in the flesh and to have claimed to be without sin. Many scholars link these teachers with an early form of Docetism, the belief that Christ only seemed to be human.
Read it as a sermon or circular letter more than a personal one. Its thought moves in spirals, with key words (light, love, truth, remain, know, born of God) taken up again and again. Many statements are tests, framed as “If we say” (1:8) or “By this we know” (3:24), which give readers ways to recognise genuine faith in themselves and others.
One textual note matters here. Older English Bibles such as the King James Version add words at 5:7–8 naming the Father, the Word and the Holy Spirit as three witnesses in heaven. The addition, known as the Johannine Comma (comma here meaning a short phrase), is missing from all early Greek manuscripts and first appears in Latin. Modern translations leave it out, including the World English Bible used here.
1 John is a letter of assurance, written that you may know that you have eternal life
(5:13). It keeps setting tests: 9 times it says by this we know (once, you know), and each time names what can be known and the sign that shows it. The signs come back to a few things: keeping his commandments, love, the Spirit, and confessing that Jesus came in the flesh. Then the letter ends with 3 plain statements in a row, each beginning We know
.
we know that we know himby
if we keep his commandmentskeeping his commandments
we know that we are in himby
whoever keeps his wordkeeping his commandments
we know loveby
he laid down his life for uslove
we know that we are of the truthby
in deed and truth(3:18) love
we know that he remains in usby
by the Spirit which he gave usthe Spirit
you know the Spirit of Godby
confesses that Jesus Christ has come in the fleshwhat is confessed and heard
we know the spirit of truth, and the spirit of errorby
He who knows God listens to uswhat is confessed and heard
we know that we remain in him and he in usby
he has given us of his Spiritthe Spirit
we know that we love the children of Godby
when we love God and keep his commandmentskeeping his commandments
we know that when he is revealed, we will be like him
We know that we have passed out of death into life
if we know that he listens to us
we know that we have the petitions
We know that whoever is born of God doesn’t sin
We know that we are of God
We know that the Son of God has come
Counted in the site’s Greek: the tests use ginōskō, to come to know, and the closing sayings oida, to know for certain. The test at 3:19 takes its sign from the verse before it.
Most mentioned: Jesus Christ, Cain