3 Accordingly I bring out two epistles of the apostle, the first to Timothy, and the second to Titus. In the first is the following passage: “If a man desire the office of a bishop he desires a good work. A bishop then must be blameless, the husband of one wife, vigilant, sober, of good behaviour, given to hospitality, apt to teach, not given to wine, no striker...but patient, not a brawler, not covetous; one that rules well his own house, having his children in subjection with all gravity.
(For if a man know not how to rule his own house, how shall he take care of the church of God?) Not a novice lest being lifted up with pride he fall into the condemnation of the devil. Moreover he must have a good report of them which are without; lest he fall into reproach and the snare of the devil.” While immediately at the commencement of the epistle to Titus the following behests are laid down: “For this cause left I you in Crete that you should set in order the things that are wanting, and ordain elders in every city, as I had appointed you: if any be blameless, the husband of one wife, having faithful children not accused of riot or unruly.
For a bishop must be blameless as the steward of God; not self-willed, not soon angry, not given to wine, no striker, not given to filthy lucre; but a lover of hospitality, a lover of good men, sober, just, holy, temperate; holding fast the faithful word as he has been taught, that he may be able by sound doctrine both to exhort and to convince the gainsayers.” In both epistles commandment is given that only monogamists should be chosen for the clerical office whether as bishops or as presbyters. Indeed with the ancients these names were synonymous, one alluding to the office, the other to the age of the clergy.
No one at any rate can doubt that the apostle is speaking only of those who have been baptized. If therefore it in no wise prejudices the case of one who is to be ordained bishop that before his baptism he has not possessed all the requisite qualifications (for it is asked what he is and not what he has been), why should a previous marriage— the one thing which is in itself not sinful— prove a hindrance to his ordination? You argue that as his marriage was not a sin it was not done away with at his baptism.
This is news to me indeed, that what in itself was not a sin is to be reckoned as such. All fornication and contamination with open vice, impiety towards God, parricide and incest, the change of the natural use of the sexes into that which is against nature and all extraordinary lusts are washed away in the fountain of Christ. Can it be possible that the stains of marriage are indelible, and that harlotry is judged more leniently than honourable wedlock? I do not, Carterius might say, hold you to blame for the hosts of mistresses and the troops of favourites that you have kept; I do not charge you with your bloodshedding and sow-like wallowings in the mire of uncleanness: yet you are ready to drag from her grave for my confusion my poor wife, who has been dead long years, and whom I married that I might be kept from those sins into which you have fallen.
Tell this to the heathen who form the church's harvest with which she stores her granaries; tell this to the catechumens who seek admission to the number of the faithful; tell them, I say, not to contract marriages before their baptism, not to enter upon honourable wedlock, but like the Scots and the Atacotti and the people of Plato's republic to have community of wives and no discrimination of children, nay more, to beware of any semblance even of matrimony; lest, after they have come to believe in Christ, He shall tell them that those whom they have had have not been concubines or mistresses but wedded wives.
Source: Letters (New Advent)