Cathedral of St. Francis of assisi

Sin hurts our relationship with God, ourselves and others. As the Catechism states:

The sinner wounds God’s honor and love, his own human dignity…and the spiritual well-being of the Church, of which each Christian ought to be a living stone. To the eyes of faith no evil is graver than sin and nothing has worse consequences for the sinners themselves, for the Church, and for the whole world. (CCC 1487, 1488)

Sin is before all else an offense against God, a rupture of communion with Him.  At the same time damages commnion with the Church.   For this reason conversion entails both God's forgiveness and reconciliation with the Church, which are expressed and accomplished liturgically by the Sacrament of Penance and Reconciliation (CCC 1440).

The Sacrament of Reconciliation heals the divide between God and the penitent caused by sin.
 

A mature understanding of sin includes reflecting upon our thoughts, actions and omissions as well as examining the patterns of sin that may arise in our lives. With contrite hearts, we are also called to reflect upon the effects of our sins upon the wider community and how we might participate in sinful systems.

There are four steps in the Sacrament of Reconciliation:

We feel contrition for our sins and a conversion of heart to change our ways.
We confess our sins and human sinfulness to a priest.
We receive and accept forgiveness (absolution) and are absolved of our sins.
We celebrate God’s everlasting love for us and commit to live out a Christian life.
 

Contrition and conversion lead us to seek a forgiveness for our sins so as to repair damaged relationships with God, self, and others. We believe that only ordained priests have the faculty of absolving sins from the authority of the Church in the name of Jesus Christ (CCC 1495). Our sins are forgiven by God, through the priest.
 

The Spiritual effects of the Sacraments of Reconciliation include:

1. reconciliation with God by which the penitent recovers grace
2. reconciliation with the Church
3. remission of the eternal punishment incurred by mortal sins
4. remission, at least in part, of temporal punishments resulting from sin
5. peace and serenity of conscience, and spiritual consolation
6. an increase of spiritual strength for the Christian battle (CCC 1496)
7. Individual confession with a priest is the principal means of absolution and reconciliation of grave sins within the Church. The Sacrament of Reconciliation frees us from sinful patterns of behavior and calls us to complete conversion to Christ. Reconciliation heals our sins and repairs our relationships.