35 The bishop, then, must be without reproach, so that he is the slave of no vice: “the husband of one wife,” that is, in the past, not in the present; “sober,” or better, as it is in the Greek, “vigilant,” that is νηφάλεον; “chaste,” for that is the meaning of σὼφρονα; “distinguished,” both by chastity and conduct: “hospitable,” so that he imitates Abraham, and with strangers, nay rather in strangers, entertains Christ; “apt to teach,” for it profits nothing to enjoy the consciousness of virtue, unless a man be able to instruct the people entrusted to him, so that he can exhort in doctrine, and refute the gainsayers; “not a drunkard,” for he who is constantly in the Holy of Holies and offers sacrifices, will not drink wine and strong drink, since wine is a luxury.
If a bishop drink at all, let it be in such a way that no one will know whether he has drunk or not. “No striker,” that is, a striker of men's consciences, for the Apostle is not pointing out what a boxer, but a pontiff ought not to do. He directly teaches what he ought to do: “but gentle, not contentious, no lover of money, one that rules well his own house, having his children in subjection with all chastity.” See what chastity is required in a bishop! If his child be unchaste, he himself cannot be a bishop, and he offends God in the same way as did Eli the priest, who had indeed rebuked his sons, but because he had not put away the offenders, fell backwards and died before the lamp of God went out. “Women in like manner must be chaste,” and so on.
In every grade, and in both sexes, chastity has the chief place. You see then that the blessedness of a bishop, priest, or deacon, does not lie in the fact that they are bishops, priests, or deacons, but in their having the virtues which their names and offices imply. Otherwise, if a deacon be holier than his bishop, his lower grade will not give him a worse standing with Christ. If it were so, Stephen the deacon, the first to wear the martyr's crown, would be less in the kingdom of heaven than many bishops, and than Timothy and Titus, whom I venture to make neither inferior nor yet superior to him.
Just as in the legions of the army there are generals, tribunes, centurions, javelin-men, and light-armed troops, common soldiers, and companies, but once the battle begins, all distinctions of rank are dropped, and the one thing looked for is valour: so too in this camp and in this battle, in which we contend against devils, not names but deeds are needed: and under the true commander, Christ, not the man who has the highest title has the greatest fame, but he who is the bravest warrior.
Source: Against Jovinianus (New Advent)