This passage from the Bible talks about how if we do not love others, we do not love God.
As said in the previous post, altars have relics of saints that remind us of the communion of saints and of God’s love. Based on this passage, the altar’s relics also help us worship God because they help us love God. As alluded to in the last post, because the altar’s relics increase remembrance and devotion to saints, the relics help us to love others, like the saints, more. By loving others, we will love God. And in loving God, we will be able to worship Him in a deeper way. And like this Bible passage said, we cannot love God unless we love others.