[The Church] has received the keys of the Kingdom of heaven so that, in her, sins may be forgiven through Christ's blood and the Holy Spirit's action. In this Church, the soul dead through sin comes back to life in order to live with Christ, whose grace has saved us. 526
Catechism number 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.