But ye know the proof of him. Ye recognize from your former experience (Acts 16:1-40.) his approved character. That, as a son with the father, he hath served with me in the gospel; translate, with R.V.
, that, as a child serveth a father, so he served with me in furtherance of the gospel. Served ἐδούλευσεν); as a slave. He was both a son and servant to St. Paul, and also a fellow-worker with St. Paul, both being slaves of God.