Beyond these general reasons that the perspectives of Baur and others on Rom 15–16 are insufficiently supported, several other pieces of evidence also converge to suggest that these chapters, much in the form in which they appear in the modern, printed editions, are original to Romans.
Since only limited, if any, direct, textual evidence exists for the supposed fifteen-chapter version of the epistle, it seems quite likely that, as authenticity goes for one part of the section of Rom 15–16, so it goes for the whole (Carson, Moo, and Morris 247).
The external manuscript evidence for Rom 15–16 is very strong, and the external, patristic testimony also seems reasonably good. Origen (ca. 185–254) includes this section in his Romans commentary (Bray 353–81, 387), and both Justin Martyr (ca. 100/110-165) and Tertullian (ca. 155/160–240/250) seem to allude to it at various points (Bray 360, 375, 387). With these last two examples, however, some caution must be exercised, since they do provide only allusions to and not direct quotations from Romans (cf. Bray xxii). Moreover, Carson, Moo, and Morris, 246, note that Tertullian, at least, does not quote from Rom 15–16 in places where he might have been expected to do so. Yet, if Tertullian was indeed writing against Marcionism in these texts (Murray 2:264), he may have simply been attempting to construct his argument from texts that the Marcionites themselves would accept.
Finally, and specifically related to the doxology, very little evidence exists for its omission, and one manuscript (G), although it omits the passage, leaves room for its inclusion (Metzger 534–35)].
Based on these factors, it seems that only the doxology’s specific placement may remain somewhat in doubt, and one must admit that discerning its original placement is no simple task. Of the three basic positions in which it appears in different manuscripts (i.e., at the end of one of Romans’ last three chapters), a placement after chapter fourteen (either in addition to or instead of the placement at the end of Rom 16) would interrupt the train of Paul’s argument from 14:1–15:13. This placement could, therefore, perhaps be preferred because it is the hardest reading, and scribes copying Romans would have tended to remove rather than create difficulties in the text. Yet, this reading could also have arisen because the Marcionites used and circulated their version of Romans, which ended with chapter fourteen (Metzger 472). Reading the doxology after Rom 15 has the support of an early third-century manuscript (P46), but this textual basis is very narrow and may merely reflect a scribal idiosyncrasy (cf. Metzger 471, 473). The final placement possibility for the doxology at the end of Rom 16, of the three major possibilities, has perhaps the best breadth and antiquity in its manuscript attestation (e.g., א, B, C, D, cop, eth, it, vg). In the end, therefore, because of the possibility of Marcionite influence in the placement of the doxology after Rom 14, it seems most probable that the doxology originally appeared after Rom 16 and that Rom 15–16 formed the concluding section of Paul’s original composition.
When Paul speaks of ministering “from Jerusalem and around as far as Illyricum” (Rom 15:19), he does not indicate Jerusalem to be the chronological starting point and Illyricum to be the ending point of his ministry. Rather, he uses these cities to designate the geographical bounds for the region of his ministry (Murray 2:213–15).
First Clement 5:7 speaks of Paul reaching “the limit of the west.” While Clement may have surmised from Rom 15:25, 28 that Paul actually did reach Spain, this text at least provides ancient testimony to the plausibility of the Spanish mission. In any case, the fact that Paul did not mention Spain in any of his other letters does not invalidate the usage here any more than the destination(s) given in a company’s first bulk marketing mailing is invalidated because that company or its employees have not previously been to that place.
That Aquilla and Priscilla could not have returned to Rome and established a residence there in the interval between the composition of 1 Corinthians [ca. AD 55 (Carson, Moo, and Morris 283)] and the composition of Romans is by no means certain, especially if Romans is dated later in the period of AD 55–59 (cf. Murray 2:267–68). Moreover, Paul’s greeting so many other people in a city he had never visited does not necessarily provide evidence for non-Pauline authorship of this section of the epistle, since Paul may well have met these people elsewhere, have been introduced to them through correspondence, or have known them through others.
Very little manuscript evidence exists for omitting the doxology, and the consistent testimony of the earliest manuscripts is to have the doxology present at some point (Metzger 534). Additionally, hypothesizing a Marcionite origin for the doxology seems quite strange, since Marcion’s text of Romans did not contain it (Murray 2:263).
Perhaps the most persistently thorny issues in textual criticism of Romans are related to: (1) the placement of the doxology, which normally appears in Rom 16:25–27 in modern, printed editions and (2) the cohesion of Rom 15–16 with the rest of the epistle. While distinguishable, however, these issues cannot be completely separated from each other, since, at the very least, the doxology appears to be an ending to something.
F. C. Baur is probably the foremost scholar who has denied the authenticity of Rom 15–16 as a whole. Although his full argument for this position is quite lengthy (see Baur 1:352–65), his main reasons for rejecting these chapters authenticity are that:
Romans 15:1–13 is a needless, inferior repetition of Rom 12:1ff, and Paul could hardly be expected to have written the latter section.
Paul could not have considered Jerusalem the starting point for his ministry, as he would seem to do if he were the author of Rom 15:19.
Paul’s mission to Spain is only mentioned here (Rom 15:24, 28) and is, therefore, probably not Pauline.
The list of names in Rom 16 is too extraordinary for Paul.
In contrast to Baur’s perspective, Barth seems only to have taken issue with the doxology, while substantially accepting the rest of Rom 15–16 as Pauline. On Harnack’s authority, Barth speculates that the doxology was originally a Marcionite invention, intended to bring closure to a version of the epistle ending abruptly after Rom 14. Therefore, Barth rejects the doxology and accepts as the remainder of the traditional text of Rom 15–16 as original (Barth 523, n. 1).