1 Cor. 4:5 Therefore do not pronounce judgment before the time, before the Lord comes, who will bring to light the things now hidden in darkness and will disclose the purposes of the heart. Then each one will receive his commendation from God.
St. Cyprian of Carthage died ca. 258
For although there seem to be tares in the Church, yet neither our faith nor our charity ought to be hindered, so that because we see that there are tares in the Church we ourselves should withdraw from the Church: we ought only to labour that we may be wheat, that when the wheat shall begin to be gathered into the Lord’s barns, we may receive fruit for our labour and work. The Apostle in his epistle says,
In a great house there are not only vessels of gold and silver, but also of wood and of earth, and some to honor and some to dishonour. 2 Tim. 2:20 Let us strive, dearest brethren, and labour as much as we possibly can, that we may be vessels of gold or silver. But to the Lord alone it is granted to break the vessels of earth, to whom also is given the rod of iron. The servant cannot be greater than his lord, nor may any one claim to himself what the Father has given to the Son alone, so as to think that he can take the fan for winnowing and purging the threshing-floor, or can separate by human judgment all the tares from the wheat. That is a proud obstinacy and a sacrilegious presumption which a depraved madness assumes to itself. And while some are always assuming to themselves more dominion than meek justice demands, they perish from the Church; and while they insolently extol themselves, blinded by their own swelling, they lose the light of truth. For which reason we also, keeping moderation, and considering the Lord’s balances, and thinking of the love and mercy of God the Father, have long and carefully pondered with ourselves, and have weighed what was to be done with due moderation. (Epistle 50)