The Precepts of the Church

The Precepts of the Church are the minimum requirements laid down by her pastoral authority to guarantee the faithful a necessary minimum of prayer, sacramental life, moral effort, and growth in the love of God and neighbour. They are not counsels of perfection but obligations in conscience — the least that is asked of those who call themselves Catholic. To neglect them without serious reason is itself a matter of grave sin.

The Catechism of the Catholic Church sets them out as follows.

I. Attend Mass on Sundays and Holy Days of Obligation

The faithful are bound to participate in the Holy Sacrifice of the Mass on every Sunday and on each holy day of obligation established by the Church. Sunday, the Lord's Day, is the weekly memorial of Christ's Resurrection and the foundation of the Christian week; no ordinary business, convenience, or preference excuses its omission.

II. Confess Grave Sins at Least Once a Year

Every Catholic conscious of grave (mortal) sin is obliged to receive the Sacrament of Penance at least once in the course of each year. This precept ensures that the faithful do not remain indefinitely in a state of spiritual death, cut off from grace, but are regularly reconciled with God and with the Church.

III. Receive Holy Communion at Least During the Easter Season

The faithful must receive the Most Holy Eucharist at least once a year, and this reception is to take place during the Easter season — the weeks surrounding the great feast of the Resurrection. This minimum guarantees that every Catholic remains united to the Body and Blood of Christ, the source and summit of the Christian life.

IV. Observe the Days of Fasting and Abstinence

The Church obliges the faithful to keep the prescribed days of penance — Ash Wednesday and Good Friday as days of fasting, and all Fridays of the year (or their equivalent) as days of abstinence from meat. These penitential practices prepare the soul for the great liturgical feasts, foster self-mastery over the flesh, and unite the Christian to the sufferings of Christ.

V. Provide for the Material Needs of the Church

The faithful are obliged, each according to his ability, to contribute to the material support of the Church — her worship, her apostolic works, and the sustenance of her ministers. This duty flows from the nature of the Church as a visible society and from the justice owed to those who labour for the salvation of souls.

These five precepts are the foundation upon which the whole of the Christian moral life is built. They are not the ceiling of holiness but its floor — the bare minimum required of every baptised Catholic. The saints went immeasurably further; the precepts simply ensure that no one falls below what the Church, in her motherly care, judges necessary for salvation.

Sources

Catechism of the Catholic Church — The Precepts of the Church.
Code of Canon Law — obligation of Sunday and holy day Mass, annual confession, Easter Communion, days of penance.

Related Reading

The Lost Rhythm of Fast and Feast — on fasting, the Eucharistic fast, and the Christian calendar the precepts once shaped.
The Didache and the First Christians — the oldest surviving handbook of Church discipline, already prescribing Wednesday and Friday fasts.
Examination of Conscience — an examination that includes the precepts of the Church.