3 John 1:6
Which have borne witness of thy charity before the church: whom if thou bring forward on their journey after a godly sort, thou shalt do well: Which have borne witness of thy charity before the church: whom if thou bring forward on their journey after a godly sort, thou shalt do well:
The charity borne witness to before the church was the kindness shown by Gaius toward brethren and strangers who were preaching the gospel to the Gentiles. To bring such travelers forward on their journey after a godly sort is to receive and entertain God's missionaries with kind hospitality and practical help on their way, even when they are not influential men. The same duty rests on members of the churches to make a home for those who travel from place to place as evangelists or missionaries in any line, even at considerable personal sacrifice.
Helping fellow believers and faithful workers continue their journey in a godly manner is an expression of Christian love and is worthy, good, and commendable. That help includes sacrificial support for a servant of God and her family, and such care for God's cause is precious and worthy of thanks. The example of the verse is also seen in a family's help to travelers going to share the truth, providing for them on their way.
To give such help is to do well, and it makes the host a fellow helper to the truth. Entertaining brethren for Christ's sake and doing one's best to make the visit profitable both to guests and to hosts is recorded in heaven as worthy of special blessings. Christ keeps account of every expense incurred for His sake in this work and supplies all that is necessary for it. By contrast, the refusal and disrespect of Diotrephes, who hindered their reception and cast out those who received them, is evil discourtesy that must not be followed.