Observe here, How our apostle at once commends the great charity of Gaius, and at the same time excites him to the farther practice of it.
Where note, 1. How charity towards Christians is here styled fidelity to Christ, because shown to them upon Christ's account: Beloved, thou doest faithfully whatsoever thou doest to the brethren. Acts of charity are acts of righteousness and fidelity? he that is uncharitable is unjust.
Note, 2. The extensive nature of Gaius's charity; it was to brethren but to strangers; that is, not only to the brethren of the church with him, but to strangers in their travels to and fro, as they came near him; but more particularly to such faithful ministers as came out of foreign parts to preach the gospel, whom Gaius had hospitably and charitably entertained.
Note, 3. How he exhorts Gaius farther to furnish and help these ministers in their travels with all things necessary for their journey; because,
1. They preached the gospel freely, taking nothing of the Gentile Christians for their pains.
2. Because it was for Christ's name sake they went abroad: to preach the gospel, say some; to avoid persecution, say others.
3. Because to entertain such, is to further, as much as in us lies, the propagation of the gospel of Christ: such as contribute towards the maintenance and support of the ministers of Christ for his sake, shall have the present comfort and future reward of co-operating and contributing their parts towards the propagating and spreading of the gospel of Christ.