Now in this first letter of St. Peter there is unquestionably much that corresponds in tone with the Epistle to the Romans, especially with the twelfth and thirteenth chapters. In both letters Christians are exhorted to offer their bodies as spiritual sacrifices, to shun conformity with the world, to study to be sober in mind, and to use duly all the gifts which they possess; the same unfeigned love of the brethren is inculcated, the same patience under suffering. Christians are not to retaliate, but to overcome evil with good; they are to be in subjection to all lawful authority, and this for conscience' sake, to avoid all excesses, rioting, drunkenness, chambering, and wantonness, and to be ever looking forward to the coming of the Lord.
In like manner there will be found numerous passages in St. Paul's Epistle to the Ephesians which in spirit and tone greatly resemble the words of St. Peter. At the very outset St. Paul addresses his converts as "chosen of God in Christ before the foundation of the world, that they should be holy and without blemish before Him in love"; tells them that they were "foreordained unto adoption as sons through Jesus Christ, according to the good pleasure of His will, to the praise and glory of His grace, which He freely bestowed on them in the Beloved" (Eph. i. 3-6). Similarly St. Peter writes to "the elect ... according to the foreknowledge of God the Father, in sanctification of the Spirit, unto obedience and sprinkling of the blood of Jesus Christ," and presently he adds that "according to God's great mercy they were begotten again by the resurrection of Jesus Christ from the dead" (i. 1-3). In both epistles there is the same teaching, the same election in love, the same sonship, the same progress in holiness, the same free gift through Jesus Christ. But in neither is there a word that can be taken to militate against independent authorship. And the same remark applies to all the resemblances which exist between the two epistles in the exhortations to servants, wives, and husbands; in the commendations of humility, pity, courtesy; in the entreaties to the believers to gird up the loins of the mind and to lay aside all malice and hatred; in those passages which speak of them as strangers and pilgrims, as called from darkness to light, as being a spiritual house, built upon Christ as the head corner-stone. Of all these exhortations undoubted parallels are to be found; but they are only evidence of the common character which would pervade all the teaching of the apostolic missionaries where the people addressed were the same, the times not far apart, and the dangers and temptations known alike to all the writers. Hence parallels to St. Peter may be found in St. James too, but they are no proof that the one Apostle (or, as some critics say, some one writing under his name) copied from the other.
Nor is it easy to see reason why St. Peter might not be expected to write a letter to the congregations formed first by St. Paul. No Evangelist or Apostle could publish the message of the Gospel--that is, the life and works--of Christ without telling of His chosen followers; and amongst them, if our Gospels be a true picture, St. Peter must ever have filled a prominent place. The Churches in Asia assuredly had heard much of him, and in a time of persecution or impending trial nothing could be more fit than that the Apostle who had been most prominent amid Christ's companions should write from Babylon or from Rome, it may be, where the signs of the times would proclaim most clearly the sufferings for which the Christian inhabitants of the provinces should be prepared, to encourage the believers in Asia to steadfastness and to remind them that the same afflictions were being accomplished in their brethren that were elsewhere in the world.