15 If we reject the repentance of those who have some confidence in a conscience that may be tolerated; at once with their wife, with their children, whom they had kept safe, they are hurried by the devil's invitation into heresy or schism; and it will be attributed to us in the day of judgment, that we have not cared for the wounded sheep, and that on account of a single wounded one we have lost many sound ones. And whereas the Lord left the ninety and nine that were whole, and sought after the one wandering and weary, and Himself carried it, when found, upon His shoulders, we not only do not seek the lapsed, but even drive them away when they come to us; and while false prophets are not ceasing to lay waste and tear Christ's flock, we give an opportunity to dogs and wolves, so that those whom a hateful persecution has not destroyed, we ruin by our hardness and inhumanity.
And what will become, dearest brother, of what the apostle says: “I please all men in all things, not seeking my own profit, but the profit of many, that they may be saved. Be followers of me, as I also am of Christ.” And again: “To the weak I became as weak, that I might gain the weak.” And again: “Whether one member suffer, all the members suffer with it; or one member rejoice, all the members rejoice with it.”
Source: The Epistles of Cyprian (New Advent)