Beloved, thou doest faithfully whatsoever thou doest to the brethren, and to strangers; Faithfully - an act becoming a faithful man.
Whatsoever thou doest, х ergazee (G2038)] - distinct from the former х poieis (G4160)] "doest." Translate, 'workest:' whatsoever work of love thou dust perform. So Matthew 26:10.
And to strangers. A 'Aleph (') B C have х touto (G5124) for eis (G1519) tous (G3588)], 'and that (i:e., and those brethren) strangers.' The fact of the brethren whom thou didst entertain being "strangers" enhances the love manifested in the act. This favours Gaius of Corinth (Romans 16:23) being the Gaius of this letter.