Catholic Catechism - The Sacraments - Confession - Part 8

In the Communion of Saints
1474 The Christian who seeks to purify himself of his sin and to become holy with the help of God's grace is not alone. "The life of each of God's children is joined in Christ and through Christ in a wonderful way to the life of all the other Christian brethren in the supernatural unity of the Mystical Body of Christ, as in a single mystical person."⁸⁶
1475 In the communion of saints, "a perennial link of charity exists between the faithful who have already reached their heavenly home, those who are expiating their sins in purgatory and those who are still pilgrims on earth. between them there is, too, an abundant exchange of all good things."⁸⁷ In this wonderful exchange, the holiness of one profits others, well beyond the harm that the sin of one could cause others. Thus recourse to the communion of saints lets the contrite sinner be more promptly and efficaciously purified of the punishments for sin.

1476 We also call these spiritual goods of the communion of saints the Church's treasury, which is "not the sum total of the material goods which have accumulated during the course of the centuries. On the contrary the 'treasury of the Church' is the infinite value, which can never be exhausted, which Christ's merits have before God. They were offered so that the whole of mankind could be set free from sin and attain communion with the Father. In Christ, the Redeemer himself, the satisfactions and merits of his Redemption exist and find their efficacy."⁸⁸
1477 "This treasury includes as well the prayers and good works of the Blessed Virgin Mary. They are truly immense, unfathomable, and even pristine in their value before God. In the treasury, too, are the prayers and good works of all the saints, all those who have followed in the footsteps of Christ the Lord and by his grace have made their lives holy and carried out the mission in the unity of the Mystical Body."⁸⁹


Obtaining indulgence from God through the Church
1478 An indulgence is obtained through the Church who, by virtue of the power of binding and loosing granted her by Christ Jesus, intervenes in favor of individual Christians and opens for them the treasury of the merits of Christ and the saints to obtain from the Father of mercies the remission of the temporal punishments due for their sins. Thus the Church does not want simply to come to the aid of these Christians, but also to spur them to works of devotion, penance, and charity.⁹⁰
1479 Since the faithful departed now being purified are also members of the same communion of saints, one way we can help them is to obtain indulgences for them, so that the temporal punishments due for their sins may be remitted.


XI. THE CELEBRATION OF THE SACRAMENT OF PENANCE
1480 Like all the sacraments, Penance is a liturgical action. The elements of the celebration are ordinarily these: a greeting and blessing from the priest, reading the word of God to illuminate the conscience and elicit contrition, and an exhortation to repentance; the confession, which acknowledges sins and makes them known to the priest; the imposition and acceptance of a penance; the priest's absolution; a prayer of thanksgiving and praise and dismissal with the blessing of the priest.
1481 The Byzantine Liturgy recognizes several formulas of absolution, in the form of invocation, which admirably express the mystery of forgiveness: "May the same God, who through the Prophet Nathan forgave David when he confessed his sins, who forgave Peter when he wept bitterly, the prostitute when she washed his feet with her tears, the publican, and the prodigal son, through me, a sinner, forgive you both in this life and in the next and enable you to appear before his awe-inspiring tribunal without condemnation, he who is blessed for ever and ever. Amen."
1482 The sacrament of Penance can also take place in the framework of a communal celebration in which we prepare ourselves together for confession and give thanks together for the forgiveness received. Here, the personal confession of sins and individual absolution are inserted into a liturgy of the word of God with readings and a homily, an examination of conscience conducted in common, a communal request for forgiveness, the Our Father and a thanksgiving in common. This communal celebration expresses more clearly the ecclesial character of penance. However, regardless of its manner of celebration the sacrament of Penance is always, by its very nature, a liturgical action, and therefore an ecclesial and public action.⁹¹
1483 In case of grave necessity recourse may be had to a communal celebration of reconciliation with general confession and general absolution. Grave necessity of this sort can arise when there is imminent danger of death without sufficient time for the priest or priests to hear each penitent's confession. Grave necessity can also exist when, given the number of penitents, there are not enough confessors to hear individual confessions properly in a reasonable time, so that the penitents through no fault of their own would be deprived of sacramental grace or Holy Communion for a long time. In this case, for the absolution to be valid the faithful must have the intention of individually confessing their grave sins in the time required.⁹² The diocesan bishop is the judge of whether or not the conditions required for general absolution exist.⁹³ A large gathering of the faithful on the occasion of major feasts or pilgrimages does not constitute a case of grave necessity.⁹⁴
1484 "Individual, integral confession and absolution remain the only ordinary way for the faithful to reconcile themselves with God and the Church, unless physical or moral impossibility excuses from this kind of confession."⁹⁵ There are profound reasons for this. Christ is at work in each of the sacraments. He personally addresses every sinner: "My son, your sins are forgiven."⁹⁶ He is the physician tending each one of the sick who need him to cure them.⁹⁷ He raises them up and reintegrates them into fraternal communion. Personal confession is thus the form most expressive of reconciliation with God and with the Church.