Observe here, 1. The commendable testimony which the brethren that came from Gaius have to St. John concerning his holy and unblamable conversation, according to the direction of the gospel. The brethren testified of thee, that thou walkest in the truth: good reports of our brethren, without detracting any thing from their worth, is a manifest duty.
Observe, 2. With what joy and rejoicing St. John received the notices of Gaius' adherence to the truth, and of his answerable walking thereunto. I rejoiced when the brethren came and testified of thee; he did not envy the grace of God so largely conferred on Gaius, but rejoiced in it, and no doubt blessed God exceedingly for it: soul-mercies are the greatest mercies, and matters of the greatest joy to gracious souls.
Observe, 3. That additional joy which St. John expresses to hear that his children, that is, those persons whom he had converted to Christianity, and begotten to Christ through the gospel, did walk in the truth, that is, in the sincere practice as well as in the outward profession of religion: I have no greater joy than to hear that my children walk in the truth; the faithful ministers of Christ rejoice more in the welfare of their people's souls, than in all their worldly wealth or honour.