"[Paul's] apostolic work did not rest with the conversion of his hearers. That was a beginning; the end would not be reached until the day of Christ, and the quality of his ministry would then be tested by the quality and maturity of those whom he could present as his spiritual children. What joy would be his if they were genuine and worthy believers; what shame if they were not!"
- F.F. Bruce, The Epistles to the Colossians, to Philemon, and to the Ephesians, (p. 88).