Mark challenges us to “handle one another’s differences” by living out the “one another” commands of Scripture—not just tolerating each other’s quirks, but actively choosing humility, love, and honor in the midst of our differences. Using the metaphor of cartilage in a knee, he explains that these biblical instructions—like patience, gentleness, and forgiveness—keep our relationships from becoming painfully abrasive. While it’s natural to get annoyed with others, especially in close community, we’re called to bear with one another in love, not isolate or grumble. This isn’t extra-credit Christianity—it’s the outflow of God’s work in us. As we clothe ourselves with compassion and put on sincere love, we reflect God’s grace and put the gospel on display in a broken world.