As watchman of the house of God, the pastor must always be sober and vigilant. This is his first duty and the first mark of good pastoral care.
"Endure hardship," κακοπαθησον. Take up every painful labor, neither sparing nor pitying yourself, whenever the good order of the flock and the benefit of those pastured require it.
This does not specifically mean suffering and persecution for the faith. Rather, it denies every kind of ease and imposes readiness for every sort of work for the good of the flock, and for doing it without delay.
This must be done despite any weight it brings, and despite the sensitivity of our weakness. Included here are much vigil and prayer for the flock with fasting, the preaching of the word, and visiting the flock for instruction and correction.
It also includes the firm introduction and support of saving order, despite all obstacles and resistance.
"Do the work of an evangelist." Do the work means: complete and bring to its end the work of an evangelist of salvation laid upon you. You received it, began it, and are carrying it on. Carry it on to the end.
This is the instruction: do not let zeal go out. Kindle it again and again, driving yourself to reach successfully the intended end.
"Bring to completion what you began, and sow them with the Gospel while they are still sound" (Oecumenius).
"Make full proof of your ministry," πληροφορησον, means satisfy it, fulfill it satisfactorily. Let your conscience, and all who know you, say that for your part you have done everything.
Let all your strength, both of soul and body, be spent on the work of ministry. Let no task be omitted, no effort postponed, and no precaution left unattended.
Wherever you needed to be, you were there. If speaking was required, you did not keep silent. If action was required, you did not withdraw from the work.
With respect to preaching, one part of the ministry, Theodoret writes: "Whether they listen or do not listen, you teach. In this way you will accomplish the work proper to the ministry."
What is said of this should also be applied to every other part. Ambrosiaster defines it generally: "The Apostle exhorts and persuades him to watch over church discipline, to act courageously, and to interpret Scripture.
Then the flock, becoming trained and wise through this, will be able easily to avoid the deceit of empty myths."