Assuming, therefore, the Pauline authorship of the thirteen epistles, we may note that they, reveal in a remarkable way the growth in Paul's apprehension of Christ and Christianity, his adaptation to varied situations, his grasp of world-problems and the eternal values of life. Paul wrote other epistles, as we know. In
1Co 5:9 there is a clear reference to a letter not now known to us otherwise, earlier than 1 Corinthians. The use of "every epistle" in
2Th 3:17 naturally implies that Paul had written more than two already. It is not certain to what letter Paul refers in
2Co 2:4-most probably to one between 1 and 2 Corinthians, though, as already shown, some scholars find that letter in
2Co 10-13. Once more Paul (
Col 4:16) mentions an epistle addressed to the church at Laodicea. This epistle is almost certainly that which we know as Ephesians. If not, here is another lost epistle. Indeed, at least two apocryphal Epistles to the Laodiceans were written to supply this deficiency. As early as
2Th 2:2 forgers were at work to palm, off epistles in Paul's name, "or by epistle as from us," to attack and pervert Paul's real views, whom Paul denounces. It was entirely possible that this "nefarious work" would be continued (Gregory, Canon and Text of the New Testament, 1907, 191), though, as Gregory argues, Paul's exposure here would have a tendency to put a stop to it and to put Christians on their guard and to watch for Paul's signature to the epistles as a mark of genuineness (
2Th 3:17;
1Co 16:21;
Ga 6:11;
Col 4:18). This was all the more important since Paul evidently dictated his letters to amanuenses, as to Tertius in the case of
Ro 16:22. In the case of
Phm 1:19, Paul probably wrote the whole letter. We may be sure therefore that, if we had the other genuine letters of Paul, they would occupy the same general standpoint as the thirteen now in our possession. The point to note here is that the four groups of Paul's Epistles fit into the historical background of the Ac as recorded by Luke, barring the fourth group which is later than the events in Acts. Each group meets a specific situation in a definite region or regions, with problems of vital interest. Paul attacks these various problems (theological, ecclesiastical, practical) with marvelous vigor, and applies the eternal principles of the gospel of Christ in such fashion as to furnish a norm for future workers for Christ. It is not necessary to say that he was conscious of that use. Deissmann (St. Paul, 12 f) is confident on this point: "That a portion of these confidential letters should be still extant after centuries, Paul cannot have intended, nor did it ever occur to him that they would be." Be that as it may, and granted that Paul's Epistles are "survivals, in the sense of the technical language employed by the historical method" (ibid., 12), still we must not forget that Paul attached a great deal of importance to his letters and urged obedience to the teachings which they contained: "I adjure you by the, Lord that this epistle be read unto all the brethren" (
1Th 5:27). This command we find in the very first one preserved to us. Once more note
2Th 3:14: "And if any man obeyeth not our word by this ep., note that man, that ye have no company with him." Evidently therefore Paul does not conceive his epistles as mere incidents in personal correspondence, but authoritative instructions for the Christians to whom they are addressed. In
1Co 7:17, "And so ordain I in all the churches," he puts his epistolary commands on a paragraph with the words of Jesus quoted in the same chapter. Some indeed at Corinth (
2Co 10:9 f) took his "letters" as an effort to "terrify" them, a thing that he was afraid to do in person. Paul (
2Co 10:11) does not deny the authority of his letters, but claims equal courage when he comes in person (compare
2Co 13:2,
10). That Paul expected his letters to be used by more than the one church to which they were addressed is clear from
Col 4:16: "And when this epistle hath been read among you, cause that it be read also in the church of the Laodiceans; and that ye also read the epistle from Laodicea." If the letter to Laodicea is our Eph and a sort of circular letter (compare Galatians), that is clear. But it must be noted that Colossians, undoubtedly a specific letter to Colosse, is likewise to be passed on to Laodicea. It is not always observed that in
1Co 1:2, though the epistle is addressed "unto the church of God which is at Corinth," Paul adds, "with all that call upon the name of our Lord Jesus Christ in every place, their Lord and ours." Philemon is, of course, a personal letter, though it deals with a sociological problem of universal interest. The Pastoral Epistles are addressed to two young ministers and have many personal details, as is natural, but the epistles deal far more with the social aspects of church life and the heresies and vices that were threatening the very existence of Christianity in the Roman empire. Paul is eager that Timothy shall follow his teaching (
2Ti 3:10 ), and "the same commit thou to faithful men, who shall be able to teach others also" (
2Ti 2:2). It is this larger view of the future of Christianity that concerns Paul very keenly. The very conception of his ministry to the Gentiles (
Ro 15:16;
Eph 3:7 ) led Paul to feel that he had a right to speak to all, "both to Greeks and to Barbarians" (
Ro 1:14), and hence, even to Rome (
Ro 1:15 f). It is a mistake to limit Paul's Epistles to the local and temporary sphere given them by Deissmann.