Repenting sin

This call by the Apostle indicates at least indirectly the close link between the Eucharist and Penance. Indeed, if the first word of Christ's teaching, the first phrase of the Gospel Good News, was "Repent, and believe in the gospel" (metanoeite), the Sacrament of the Passion, Cross and Resurrection seems to strengthen and consolidate in an altogether special way this call in our souls. The Eucharist and Penance thus become in a sense two closely connected dimensions of authentic life in accordance with the spirit of the Gospel, of truly Christian life. The Christ who calls to the Eucharistic banquet is always the same Christ who exhorts us to penance and repeats his "Repent". Without this constant ever renewed endeavour for conversion, partaking of the Eucharist would lack its full redeeming effectiveness and there would be a loss or at least a weakening of the special readiness to offer God the spiritual sacrifice in which our sharing in the priesthood of Christ is expressed in an essential and universal manner. (Papal Encyclical, Redemptor hominis, 4 March 1979).