1 John 4 warns of false prophets who deny the truth about Jesus. We are reminded, however, that we are indwelled by the Holy Spirit, who is "greater than the spirit who lives in the world" and therefore we "have already won a victory over those people".
Next, John explains that God is love, and the love of God is in us "who confess that Jesus is the Son of God" . Since God so loved us that he sent his one and only Son in order for us to have eternal life, "we surely ought to love each other". Furthermore, John says, "those who love God must also love their Christian brothers and sisters".