1 Peter 3:8

“Finally, be ye all of one mind, etc.] Not that the apostle was about to conclude his epistle; but having finished his exhortations respecting the obedience of subjects to magistrates, and of servants to their masters, and the duties incumbent on husbands and wives, he proceeds to sum up what he had further to say, in general rules; which regarded all sorts of Christians, magistrates and subjects, masters and servants, husbands and wives, parents and children, old and young, rich and poor, of whatsoever state, age, sex, or condition; and so the Arabic version renders it, “the sum of the commandment is”; and the Ethiopic version, “the sum of all is this”; namely, what follows; “be ye all of…”

“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.”

“Finally - As the last direction, or as general counsel in reference to your conduct in all the relations of life. The apostle had specified most of the important relations which Christians sustain, 1 Peter 2:13-25; 1 Peter 3:1-7; and he now gives a general direction in regard to their conduct in all those relations. Be ye all of one mind - See the notes at Romans 12:16. The word used here (ὁμόφρων homophrōn) does not elsewhere occur in the New Testament. It means, of the same mind; like-minded; and the object is to secure harmony in their views and feelings. Having compassion one of another - “Sympathizing,” (συμπαθεῖς sumpatheis;) entering into one another’s feelings, and evincing a…”

“Finally - This part of the epistle reaches to Pe1 4:11. The apostle seems to have added the rest afterwards. Sympathizing - Rejoicing and sorrowing together. Love all believers as brethren. Be pitiful - Toward the afflicted. Be courteous - To all men. Courtesy is such a behaviour toward equals and inferiors as shows respect mixed with love. 1 Peter 3:9”

“3:8-12 Finally: This is the last in a series of exhortations to different groups (2:13–3:12). Here, all believers must respond to others—believers (3:8) and unbelievers (3:9-12)—with love.”

“be: Act 2:1, Act 4:32; Rom 12:16, Rom 15:5; Co1 1:10; Phi 3:16 having: Zac 7:9; Mat 18:33; Luk 10:33; Rom 12:15; Co1 12:26; Jam 2:13, Jam 3:17 love as brethren: or, loving to the brethren, Pe1 1:22, Pe1 2:17; Rom 12:10; Heb 13:1; Pe2 1:7; Jo1 3:14, Jo1 3:18, Jo1 3:19 pitiful: Psa 103:13; Pro 28:8; Mat 18:33; Jam 5:11 courteous: Act 27:3, Act 28:7; Eph 4:31, Eph 4:32, Eph 5:1, Eph 5:2; Phi 4:8, Phi 4:9; Col 3:12 1 Peter 3:9”