John Chrysostom
"The servant of the Lord must not quarrel." One must not quarrel even in disputation. The servant of God must be far from quarrels. If God is the God of peace, how can the servant of the God of peace quarrel?
"But be gentle to all." "The servant of the Lord," he says, "must not quarrel, but be gentle to all." Why then does he say, "Rebuke them with all authority" (Tit 2:15)? And again here, "Let no one despise your youth" (1 Tim 4:12)? And again, "Rebuke them sharply" (Tit 1:13)?
Because even this is the work of meekness. Strong reproof, when it is done with meekness, can especially touch the heart. One can touch the heart much sooner by meekness than shame it by severity.
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"Able to teach," that is, for all who desire to learn, since he also says, "Reject a heretical man after the first and second admonition" (Tit 3:10).
"Patient." He added this well. A teacher especially needs freedom from malice, otherwise everything will be in vain.
If fishermen often cast their nets all day and catch nothing, yet do not despair, much more should we not despair. See what really happens. It often happens that the plow of the word, working through continual exhortation, enters the depth of the soul and destroys the passion that has possessed it.
He who has listened a thousand times must feel something. It is impossible for someone who listens continually to feel nothing at all.
Thus it may happen that a man already ready to be persuaded loses everything because of our impatience. It is like an unskilled farmer who plants a vineyard and digs around it in the first, second, and third years, hoping to receive fruit.
When he receives none and loses hope after three years, he abandons it in the fourth year, precisely when he ought to receive the reward for his labors.