III John 1:5

faithfully--an act becoming a faithful man. whatsoever thou doest--a distinct Greek word from the former "doest": translate, "workest": whatsoever work, or labor of love, thou dost perform. So Mat 26:10, "She hath wrought a good work upon me." and to strangers--The oldest manuscripts, "and that (that is, and those brethren) strangers." The fact of the brethren whom thou didst entertain being "strangers," enhances the love manifested in the act.

In this epistle the apostle congratulates Gaius upon the prosperity of his soul (Jo3 1:1, Jo3 1:2), upon the fame he had among good Christians (Jo3 1:3, Jo3 1:4), and upon his charity and hospitality to the servants of Christ (Jo3 1:5, Jo3 1:6). He complains of contemptuous treatment by an ambitious Diotrephes (Jo3 1:9, Jo3 1:10), recommends Demetrius (Jo3 1:12), and expresses his hope of visiting Gaius shortly (Jo3 1:13, Jo3 1:14).

1:5-8 John now encourages Gaius to continue supporting the traveling teachers whom John had sent out (1:3). 1:5 Gaius provided hospitality for the traveling teachers (literally the brothers) sent by John from church to church to affirm the apostles’ teaching about Christ (1:7-8). By doing this, Gaius showed that he had received the truth from the apostles and that he was thus faithful to God.