8.2.14 The relationship between forgiveness of sins and Holy Communion
The forgiveness of sins and Holy Communion are closely related to one another. Both the forgiveness of sins and Holy Communion have their foundation in Christ's sacrifice (Acts 13: 37-38). Jesus Christ instituted Holy Communion on the basis of His sacrifice: "For this is My blood of the new covenant, which is shed for many for the remission of sins" (Matthew 26: 28). At the same time, these words of the Lord make it clear that He brought His sacrifice in order to redeem mankind from sin.
Christ authorised His Apostles to proclaim the forgiveness of sins (see 7.6.2) and to celebrate Holy Communion as He Himself had done with them (Luke 22: 19).
Although the sacrifice of Christ becomes present in Holy Communion, Holy Communion does not in itself effect forgiveness of sins. Rather, the forgiveness of sins proclaimed before the consecration of the elements of Holy Communion also enables believers to worthily partake of Holy Communion.