I love the Bible because it is so gritty with the don’t of real life situations. John told his churches that they should be willing to lay down their lives for each other. That’s pretty good in theory, especially when you don’t think it will ever be necessary. But this verse makes the application of that principle an everyday reality.
N:B- Another favourite thing I love about Jesus is what he said in one of His teachings. “Love your neighbour as yourselves”.