The promise of eternal life, 1 John 2:25-29
John is writing to the Christians in the churches because false doctrine had crept into the church and was deceiving many. He says that in vs 26, “These things I have written to you concerning those who are trying to deceive you.” The false doctrine was especially perpetrated on the church by what was eventually called Gnosticism, which means knowledge. They professed that there was a special knowledge, a secret knowledge of spiritual things, which they wanted to teach the church. But it was false knowledge, and so John calls them false prophets. In fact he calls them antichrists back