What does the Bible say about how Christians should love one another?

The Scriptures emphasize the importance of love among believers, paralleling Christ's sacrificial love for us. In John 15:12, Jesus commands us to love one another just as He loved us. This love is not merely an emotion but a commitment that we express through actions, unity, and support within the church. As His followers, we are called to reflect the character of Christ, which includes selfless love, kindness, and hospitality to one another. John reminds us that our love should not only be theoretical but demonstrated through our behavior, standing in stark contrast to the self-serving tendencies exemplified by figures like Diotrephes.