For this reason, the Church must consider it one of her principal duties-at every stage of history and especially in our modern age-to proclaim and to introduce into life the mystery of mercy, supremely revealed in Jesus Christ. Not only for the Church herself as the community of believers but also in a certain sense for all humanity, this mystery is the source of a life different from the life which can be built by man, who is exposed to the oppressive forces of the threefold concupiscence active within him.128 It is precisely in the name of this mystery that Christ teaches us to forgive always. How often we repeat the words of the prayer which He Himself taught us, asking "forgive us our trespasses as we forgive those who trespass against us," which means those who are guilty of something in our regard129
Christ emphasizes so insistently the need to forgive others that when Peter asked Him how many times he should forgive his neighbor He answered with the symbolic number of "seventy times seven,"131 meaning that he must be able to forgive everyone every time. It is obvious that such a generous requirement of forgiveness does not cancel out the objective requirements of justice. Properly understood, justice constitutes, so to speak, the goal of forgiveness. In no passage of the Gospel message does forgiveness, or mercy as its source, mean indulgence towards evil, towards scandals, towards injury or insult. In any case, reparation for evil and scandal, compensation for injury, and satisfaction for insult are conditions for forgiveness.