Paul is giving a list of short commands to those who are in Christ. He is describing what it means to live as a self-sacrificing Christian. He writes of love as a kind of devotion to a sibling. We must love each other with a brotherly affection. The Greek word used here inspired the name of a city in the United States: Philadelphia, self-described as the city of brotherly love. Those in Christ are truly brothers and sisters. God adopts us as His children, welcoming us into His family. That family includes everyone who knows God as Father. Brothers and sisters, of course, don't always get along. In most families, however, they share a loyalty and sense of belonging that surpasses most normal friendships.
- BibleRef
