1 tn Grk “who” (a relative pronoun that continues the sentence begun in 3 John 5).
2 sn Which church does the author refer to here? The church where Gaius is, the church where the author is, a different local church where the “brothers” are, or the ‘universal’ church, the church at large? Since the suggestion in 3 John 3 is that the “brothers” have come and testified in the author’s church about what Gaius has done for them, it seems most likely that the “church” mentioned here is also the author’s church, where he is currently located. Other possibilities cannot be ruled out, but seem unnecessarily complicated.
3 sn Now the author, after commending Gaius for his faithful service to the traveling missionaries in the past (see 3 John 5), now requests additional assistance at the present time (send them on their way in a manner worthy of God). Apparently the missionaries are on their way to visit the area where Gaius’ church is located a second time. They had been there once already and had returned with a good report of how Gaius had assisted them. It is entirely possible that they themselves carry with them the present letter as a letter of introduction. Along these lines it has been suggested that Demetrius (see 3 John 12) is one of these traveling missionaries, perhaps the leader of the delegation, and the author is formally introducing him to Gaius, since when he was there the last time he was a stranger (v. 5) but Gaius assisted him anyway.
4 sn Clearly the author does not refer to himself alone by the use of the first person plural pronoun we here, since the issue is support for the traveling missionaries. It stands in contrast to the pagans mentioned in the previous verse, and is thus to be understood as inclusive of all true Christians: the author, Gaius, and all true Christians. All true Christians ought to support the endeavors of these traveling missionaries in their efforts to counteract the heretical teaching of the opponents.
5 tn The ἵνα (Jina) clause indicates the result of such support for the traveling missionaries: The Christian who helps to support them in their efforts thus becomes a coworker in cooperation with the truth. Although the dative τῇ ἀληθείᾳ (th alhqeia) is somewhat difficult to specify, it would appear (corresponding to the σύν- [sun-] prefix of the noun modified) to indicate a sense of cooperation with “the truth” which is at work through the missionaries. There is precedent in the Johannine literature for understanding “truth” as personified (John 8:32, “the truth will make you free”; possibly also 1 John 3:19). More explicitly, 1 John 4:6 identifies the Holy Spirit as “the Spirit of Truth,” a characterization repeated in 1 John 5:6. Thus it seems likely that the “truth” at work through the missionaries here is ultimately the Holy Spirit, who works through their efforts. The Christian who supports them thus becomes a coworker with the Spirit of God himself.
