3 John 1:6

Which have borne witness of thy charity Rather, as R.V., Who hare witness to thy love. There is no need here to turn the aorist into the perfect; and certainly in S. John's writings (whatever may be our view of 1 Corinthians 13) ἀγάπη must always be rendered -love." In a text like this, moreover, -charity" is specially likely to be understood in the vulgar sense of almsgiving.

before the church Probably at Ephesus; but wherever S. John was when he wrote the letter. Only in this Third Epistle does he use the word -church."

whom … thou shalt do well The verb comes immediately after the relative in the Greek, and may as well remain there; whom thou wilt do well to forward on their journey: literally, whom thou wilt do well having sent on. The word for -send on" or -forward" occurs Acts 15:3; Acts 20:38; Acts 21:5; Romans 15:24; 1 Corinthians 16:6; 1Co 16:11; 2 Corinthians 1:16; Titus 3:13. There would be abundant opportunity in the early Church for such friendly acts; and in telling Gaius that he will do a good deed in helping Christians on their way the Apostle gently urges him to continue such work. Comp. Philippians 4:14; Acts 10:33.

after a godly sort This is vague and rather wide of the Greek, which means, worthily of God (R.V.), or, in a manner worthy of God (Rhemish), or as it beseemeth God(Tyndale and Genevan). -Help them forward in a way worthy of Him whose servants they and you are." Comp. 1 Thessalonians 2:12; Colossians 1:10.