Catechism 1441–1445, 1461–1467

Because Christ gave the power to forgive sins to human beings, and told them to use it. God alone forgives sins — the priest is the instrument He chose.

What the Church Teaches

Only God forgives sins. The Church has never taught anything else. What she also teaches is that Christ chose to forgive them through particular men — that He entrusted the ministry of reconciliation to the apostles and their successors, and that when a priest gives absolution it is Christ who acts through him.

The Catechism is direct about both halves. Sin is never a purely private matter between an individual and God, because it damages the Church as well; and so reconciliation is given through the Church, in a sacrament that involves another human being (CCC 1440–1442). The priest is not a substitute for God. He is the sign that the forgiveness is real, spoken aloud, from outside your own head.

Where This Comes From

On the evening of the Resurrection, Christ appeared to the apostles, breathed on them and said: Receive the Holy Spirit. Whose sins you forgive are forgiven them, and whose sins you retain are retained (John 20:22–23). That is a strange thing to say to men who have no power to forgive sins — unless He meant to give them that power.

The same authority appears earlier, when Christ tells Peter that whatever he binds on earth will be bound in heaven (Matthew 16:19), and extends it to the Twelve (Matthew 18:18). The Church has understood these words the same way since the earliest centuries, when public penance was practised openly and the reconciliation of sinners was a bishop’s work.

Common Misunderstandings

• "I can confess directly to God." You can and you should — an act of contrition made privately is real, and perfect contrition, with the intention of confessing as soon as possible, obtains forgiveness even before the sacrament. What the sacrament adds is certainty, and the grace attached to it. You do not have to wonder whether you were sorry enough.
• "The priest will judge me." He is bound by the seal of confession absolutely: he may never reveal what he hears, to anyone, for any reason, under penalty of automatic excommunication. He has also heard everything before. The confessional is the one room in the world where honesty costs you nothing.
• "It’s just Catholic guilt." The sacrament exists to remove guilt, not to manufacture it. Most people leave a confessional lighter than they went in, which is the point.

What It Means in Practice

The Church asks the faithful to confess grave sin before receiving Communion, and to go at least once a year. In practice, many find that monthly confession does more for the spiritual life than any other single habit — not because they have committed grave sin every month, but because regular honesty about small things stops them becoming large ones.

If it has been years, say so at the start. That sentence is welcome in every confessional in the world, and the priest will walk you through the rest.

Pray With This

• How to Go to Confession — the whole thing, step by step
• Examination of Conscience — questions to ask before you go
• The Act of Contrition
• Prayer Before Confession and after

In the Catechism

• 1440–1449 — sin as an offence against God and against the Church, and Christ’s gift of reconciliation
• 1461–1467 — the minister of the sacrament, and the seal of confession
• 1468–1470 — the effects of the sacrament

Read the full text at vatican.va.