31 Now, such a troublous time was the time at which Hilary wrote in the passage which you have thought fit artfully to adduce against so many Divine testimonies, as if by it you could prove that the Church has perished from the earth. You may just as well say that the numerous churches of Galatia had no existence at the time when the apostle wrote to them: “O foolish Galatians, who has bewitched you,” that, “having begun in the Spirit, you are now made perfect in the flesh?” For thus you would misrepresent that learned man, who (like the apostle) was sternly rebuking the slow of heart and the timid, for whom he was travailing in birth a second time, until Christ should be formed in them. For who does not know that many persons of weak judgment were at that time deluded by ambiguous phrases, so that they thought that the Arians believed the same doctrines as they themselves held; and that others, through fear, had yielded and feigned consent, not walking uprightly according to the truth of the gospel, to whom you would have denied that forgiveness which, when they had been turned from their error, was extended to them? But in refusing such pardon, you prove yourselves wholly ignorant of the word of God. For read what Paul has recorded concerning Peter, and what Cyprian has expressed as his view on the ground of that statement, and do not blame the compassion of the Church, which does not scatter the members of Christ when they are gathered together, but labours to gather His scattered members into one. It is true that those who then stood most resolute, and were able to understand the treacherous phrases used by the heretics, were few in number when compared with the rest; but some of them it is to be remembered were then bravely enduring sentence of banishment, and others were hiding themselves for safety in all parts of the world. And thus the Church, which is increasing throughout all nations, has been preserved as the Lord's wheat, and shall be preserved unto the end, yea, until all nations, even the barbarous tribes, are within its embrace. For it is the Church which the Son of man has sown as good seed, and of which He has foretold that it should grow among the tares until the harvest. For the field is the world, and the harvest is the end of time.
32. Hilary, therefore, either was rebuking not the wheat, but the tares, in those ten provinces of Asia, or was addressing himself to the wheat, because it was endangered through some unfaithfulness, and spoke as one who thought that the rebuke would be useful in proportion to the vehemence with which it was given. For the canonical Scriptures contain examples of the same manner of rebuke in which what is intended for some is spoken as if it applied to all. Thus the apostle, when he says to the Corinthians, “How say some among you, that there is no resurrection of the dead?” proves clearly that all of them were not such; but he bears witness that those who were such were not outside of their communion, but among them. And shortly after, lest those who were of a different opinion should be led astray by them, he gave this warning: “Be not deceived: evil communications corrupt good manners. Awake to righteousness, and sin not; for some have not the knowledge of God: I speak this to your shame.” But when he says, “Whereas there is among you envying, and strife, and divisions, are you not carnal, and walk as men?” he speaks as if it applied to all, and you see how grave a charge he makes. Wherefore, if it were not that we read in the same epistle, “I thank my God always on your behalf, for the grace of God which is given you by Jesus Christ; that in everything you are enriched by Him, in all utterance, and in all knowledge; even as the testimony of Christ was confirmed in you: so that you come behind in no gift,” we would think that all the Corinthians had been carnal and natural, not perceiving the things of the spirit of God, fond of strife, and full of envy, and “walking as men.” In like manner it is said, on the one hand, “the whole world lies in wickedness,” because of the tares which are throughout the whole world; and, on the other hand, Christ “is the propitiation for our sins, and not for ours only, but also for the sins of the whole world,” because of the wheat which is throughout the whole world.
33. The love of many, however, waxes cold because of offenses, which abound increasingly the more that, within the communion of the sacraments of Christ, there are gathered to the glory of His name even those who are wicked, and who persist in the obstinacy of error; whose separation, however, as chaff from the wheat, is to be effected only in the final purging of the Lord's threshing-floor. These do not destroy those who are the Lord's wheat— few, indeed, when compared with the others, but in themselves a great multitude; they do not destroy the elect of God, who are to be gathered at the end of the world from the four winds, from the one end of heaven to the other. For it is from the elect that the cry comes, “Help, Lord! For the godly man ceases, for the faithful fail from among the children of men;” and it is of them that the Lord says, “He that shall endure to the end (when iniquity shall abound), the same shall be saved.” Moreover, that the psalm quoted is the language not of one man, but of many, is shown by the following context: “You shall keep us, O Lord; You shall preserve us from this generation for ever.” On account of this abounding iniquity which the Lord foretold, it is said in another place: “When the Son of man comes, shall He find faith on the earth?” This doubt expressed by Him who knows all things prefigured the doubts which in Him we entertain, when the Church, being often disappointed in many from whom much was expected, but who have proved very different from what they were supposed to be, is so alarmed in regard to her own members, that she is slow to believe good of any one. Nevertheless it would be wrong to cherish doubt that those whose faith He shall find on the earth are growing along with the tares throughout the whole field.
34. Therefore it is the same Church also which within the Lord's net is swimming along with the bad fishes, but is in heart and in life separated from them, and departs from them, that she may be presented to her Lord a “glorious Church, not having spot or wrinkle.” But the actual visible separation she looks for only on the sea-shore, i.e. at the end of the world—meanwhile correcting as many as she can, and bearing with those whom she cannot correct; but she does not abandon the unity of the good because of the wickedness of those whom she finds incorrigible.
Source: Letters (New Advent)