A.B. Simpson emphasizes the social and civil duties of Christians as outlined in 1 and 2 Peter, urging believers to honor all people, submit to governing authorities, and embody Christ-like behavior in all relationships. He highlights the importance of recognizing the inherent value in every individual, advocating for kindness and respect in social interactions, and fulfilling civic responsibilities for the Lord's sake. Simpson also addresses the roles of servants, wives, and husbands, encouraging mutual respect and love within these relationships, and concludes with a call to live out one's faith in every aspect of life, reflecting Christ's love and grace.