2 Timothy 4:5

5But watch thou in all things. He proceeds with the former exhortation, to the effect that the more grievous the diseases are, the more earnestly Timothy may labor to cure them; and that the nearer dangers are at hand, the more diligently he may keep watch. And because the ministers of Christ, when they faithfully discharge their office, are immediately called to engage in combats, he at the same time reminds Timothy to be firm and immovable in enduring adversity. (196)

Do the work of an Evangelist That is, “Do that which belongs to an evangelist.” Whether he denotes generally by this term any ministers of the gospel, or whether this was a special office, is doubtful; but I am more inclined to the second opinion, because from Ephesians 4:11 it is clearly evident that this was an intermediate class between apostles and pastors, so that the evangelists ranked as assistants next to the apostles. It is also more probable that Timothy, whom Paul had associated with himself as his closest companion in all things, surpassed ordinary pastors in rank and dignity of office, than that he was only one of their number. Besides, to mention an honorable title of office tends not only to encourage him, but to recommend his authority to others; and Paul had in view both of these objects.

Render thy ministry approved If we read this clause as in the old translation, “Fulfill thy ministry,” the meaning will be: “Thou canst not fully discharge the office intrusted to thee but by doing those things which I have enjoined. Wherefore see that you fail not in the middle of the course.” But because πληροφορεῖν commonly means “to render certain” or “to prove,” I prefer the following meaning, which is also most agreeable to the context, — that Timothy, by watching, and by patiently enduring afflictions, and by constant teaching, will succeed in having the truth of his ministry established, because from such marks all will acknowledge him to be a good and faithful minister of Christ.