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.
I can spend 20 hour a week in Bible study without complaint but I’d rather shovel rocks than sit through most 20 minute sermons. Transformation without information has all the nourishment of whipped cream.
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).
The Apostle Paul divides humanity by one thing: those who belong to God and those who don’t. It is the only distinction that matters.
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?