CATECHISM OF THE CATHOLIC CHURCH
SECOND EDITION

Paragraphs 982–986

982 There is no offense, however serious, that the Church cannot forgive. "There is no one, however wicked and guilty, who may not confidently hope for forgiveness, provided his repentance is honest. Christ who died for all men desires that in his Church the gates of forgiveness should always be open to anyone who turns away from sin.
983 Catechesis strives to awaken and nourish in the faithful faith in the incomparable greatness of the risen Christ's gift to his Church: the mission and the power to forgive sins through the ministry of the apostles and their successors:

The Lord wills that his disciples possess a tremendous power: that his lowly servants accomplish in his name all that he did when he was on earth.

Priests have received from God a power that he has given neither to angels nor to archangels . . . . God above confirms what priests do here below.

Were there no forgiveness of sins in the Church, there would be no hope of life to come or eternal liberation. Let us thank God who has given his Church such a gift.

984 The Creed links "the forgiveness of sins" with its profession of faith in the Holy Spirit, for the risen Christ entrusted to the apostles the power to forgive sins when he gave them the Holy Spirit.
985 Baptism is the first and chief sacrament of the forgiveness of sins: it unites us to Christ, who died and rose, and gives us the Holy Spirit.
986 By Christ's will, the Church possesses the power to forgive the sins of the baptized and exercises it through bishops and priests normally in the sacrament of Penance.