2 Timothy 4:2

2Be instant in season, out of season By these words he recommends not only constancy, but likewise earnestness, so as to overcome all hindrances and difficulties; for, being, by nature, exceedingly effeminate or slothful, we easily yield to the slightest opposition, and sometimes we gladly seek apologies for our slothfulness. Let us now consider how many arts Satan employs to stop our course, and how slow to follow, and how soon wearied are those who are called. Consequently the gospel will not long maintain its place, if pastors do not urge it earnestly.

Moreover, this earnestness must relate both to the pastor and to the people; to the pastor, that he may not devote himself to the office of teaching merely at his own times and according to his own convenience, but that, shrinking neither from toils nor from annoyances, he may exercise his faculties to the utmost. So far as regards the people, there is constancy and earnestness, when they arouse those who are asleep, when they lay their hands on those who are hurrying in a wrong direction, and when they correct the trivial occupations of the world. To explain more fully in what respects the pastor must “be instant,” the Apostle adds —

Reprove, rebuke, exhort By these words he means, that we have need of many excitements to urge us to advance in the right course; for if we were as teachable as we ought to be, a minister of Christ would draw us along by the slightest expression of his will. But now, not even moderate exhortations, to say nothing of sound advices, are sufficient for shaking off our sluggishness, if there be not increased vehemence of reproofs and threatenings.

With all gentleness and doctrine. A very necessary exception; for reproofs either fall through their own violence, or vanish into smoke, if they do not rest on doctrine Both exhortations and reproofs are merely aids to doctrine, and, therefore, have little weight without it. We see instances of this in those who have merely a large measure of zeal and bitterness, and are not furnished with solid doctrine. Such men toil very hard, utter loud cries, make a great noise, and all to no purpose, because they build without a foundation. I speak of men who, in other respects, are good, but with little learning, and excessive warmth; for they who employ all the energy that they possess in battling against sound doctrine, are far more dangerous, and do not deserve to be mentioned here at all.

In short, Paul means that reproofs are founded on doctrine, in order that they may not be justly despised as frivolous. Secondly, he means that keenness is moderated by gentleness; for nothing is more difficult than to set a limit to our zeal, when we have once become warm. Now when we are carried away by impatience, our exertions are altogether fruitless. Our harshness not only exposes us to ridicule, but also irritates the minds of the people. Besides, keen and violent men seem generally unable to endure the obstinacy of those with whom they are brought into intercourse, and cannot submit to many annoyances and insults, which nevertheless must be digested, if we are desirous to be useful. Let severity be therefore mingled with this seasoning of gentleness, that it may be known to proceed from a peaceful heart.