1 We had indeed decided some time ago, dearest brother, having mutually taken counsel one with another, that they who, in the fierceness of persecution, had been overthrown by the adversary, and had lapsed, and had polluted themselves with unlawful sacrifices, should undergo a long and full repentance; and if the risk of sickness should be urgent, should receive peace on the very point of death. For it was not right, neither did the love of the Father nor divine mercy allow, that the Church should be closed to those that knock, or the help of the hope of salvation be denied to those who mourn and entreat, so that when they pass from this world, they should be dismissed to their Lord without communion and peace; since He Himself who gave the law, that things which were bound on earth should also be bound in heaven, allowed, moreover, that things might be loosed there which were here first loosed in the Church.
But now, when we see that the day of another trouble is again beginning to draw near, and are admonished by frequent and repeated intimations that we should be prepared and armed for the struggle which the enemy announces to us, that we should also prepare the people committed to us by divine condescension, by our exhortations, and gather together from all parts all the soldiers of Christ who desire arms, and are anxious for the battle within the Lord's camp: trader the compulsion of this necessity, we have decided that peace is to be given to those who have not withdrawn from the Church of the Lord, but have not ceased from the first day of their lapse to repent, and to lament, and to beseech the Lord; and we have decided that they ought to be armed and equipped for the battle which is at hand.
Source: The Epistles of Cyprian (New Advent)