No church in the New Testament is more like our modern churches than the Corinthian church.
John concludes his letter saying believers can have confidence about three things: 1) that you have eternal life, 2) that your sin cannot jeopardize that life and 3) that this gospel message is true.
John tells us genuine believers will confess that Jesus is the Christ — the Jesus who was confirmed by three witnesses: “water”, “blood” and “the Spirit.”
In Paul’s time Corinth was the 2nd most important city in the Roman empire. Corinth was an exceptionally wealthy and important city in Greece.
In 1 John 4:7-19, John explains why self-sacrificing love is a mark of a believer: this other-focused love is part of God’s holy character and God is in the process of giving us His character.
The Apostle John says we can identify false prophets two ways: by the content of what they say (4:2) and by the origin of what they say (4:6).
How can John say that love is a mark of believers and hate is a mark of non-believers when we know believers who struggle with hate and non-believers who genuinely love others?
No true believer is committed to sin as a lifestyle because God plants in believers a longing for holiness and righteousness which opposes any tendency to rebel. Believers no longer remain committed to a lifestyle of sin.
1 John 2:18-28 tackles the question: how do you know what’s essential and what is non-essential?
John sets the world and the gospel in opposition to each other. You can’t serve them both. You have to choose and his first exhortation is don’t choose the world.