_She that is in Babylon, elect together with you, saluteth you; and so doth Mark my son. Salute one another with a kiss of love._ It is most natural to refer these words to a Church, and not to any individual. Some have interpreted them as an allusion to St. Peter's wife, whom, as we know from St. Paul (1 Cor. ix. 5), he sometimes had as a companion in his travels. But there is a degree of inappropriateness in speaking of a single person as elect along with these various Churches of Asia, whereas the Church in Babylon might fitly have such a distinction. It is unnecessary, too, to explain Babylon (as some have done) as intended for Rome. There was no conceivable reason in St. Peter's day why, when he was writing to lands under Roman dominion, if he meant to speak of the city in Italy, he should not call it by its real name. The Mark here named was most probably the John whose surname was Mark (Acts xii. 12), whose mother was a friend of St. Peter's from the earliest days of his apostolic labours. He, too, had been a companion of St. Paul for a time, and made another link between the two great Apostles. St. Peter calls him "son" because it is likely that both the mother and her son were won to the new teaching by him, and he employs the term of affection just as St. Paul does of Timothy, his convert (1 Tim. i. 2, 18; 2 Tim. i. 2). The salutation by a kiss is frequently mentioned. It is called "a holy kiss" (Rom. xvi. 16; 1 Cor. xvi. 20; 2 Cor. xiii. 12; 1 Thess. v. 26) in St. Paul's language. We find from Justin Martyr[12] that it had come to be used in his day as part of the ceremonial preceding the Holy Communion. It was to be a token of perfect love, according to the name which St. Peter here gives it. An evil construction was soon put upon it by the enemies of the faith; and after a long history it fell into disuse, even in the East, where such manner of salutation is more common than in the West. In his final words the Apostle has embodied the benediction of which the kiss was meant to be the symbol. [12] _Apol._ i. 65.