1 Peter 3:8

The apostle here passes from special to more general exhortations. I. He teaches us how Christians and friends should treat one another. He advises Christians to be all of one mind, to be unanimous in the belief of the same faith, and the practice of the same duties of religion; and, whereas the Christians at that time were many of them in a suffering condition, he charges them to have compassion one of another, to love as brethren, to pity those who were in distress, and to be courteous to all. Hence learn, 1. Christians should endeavour to be all of one mind in the great points of faith, in real affection, and in Christian practice; they should be like-minded one to another, according to Christ Jesus (Rom 15:5), not according to man's pleasure, but God's word. 2. Though Christians cannot be exactly of the same mind, yet they should have compassion one for another, and love as brethren; they ought not to persecute or hate one another, but love one another with more than common affection; they should love as brethren. 3. Christianity requires pity to the distressed, and civility to all. He must be a flagrant sinner, or a vile apostate, who is not a proper object of civil courtesy, Co1 5:11; Jo2 1:10, _11. II. He instructs us how to behave towards enemies. The apostle knew that Christians would be hated and evil-entreated of all men for Christ's sake; therefore, 1.

— Matthew Henry's Concise Commentary (public domain)

General summary of relative duty, after having detailed particular duties from Pe1 2:18. of one mind--as to the faith. having compassion one of another--Greek, "sympathizing" in the joy and sorrow of others. love as brethren--Greek, "loving the brethren." pitiful--towards the afflicted. courteous--genuine Christian politeness; not the tinsel of the world's politeness; stamped with unfeigned love on one side, and humility on the other. But the oldest manuscripts read, "humble-minded." It is slightly different from "humble," in that it marks a conscious effort to be truly humble.

— Jamieson-Fausset-Brown Commentary (public domain)