3:8-13 Though Christians cannot always be exactly of the same mind, yet they should have compassion one of another, and love as brethren. If any man desires to live comfortably on earth, or to possess eternal life in heaven, he must bridle his tongue from wicked, abusive, or deceitful words. He must forsake and keep far from evil actions, do all the good he can, and seek peace with all men. For God, all-wise and every where present, watches over the righteous, and takes care of them. None could or should harm those who copied the example of Christ, who is perfect goodness, and did good to others as his followers.
8. General summary of relative duty, after having detailed particular duties from 1Pe 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.