Why do Catholics fast during Lent?

Catholics fast during Lent to imitate Christ's forty days in the desert, discipline the body's desires, do penance for sin, and grow in dependence on God rather than food or comfort. Fasting is paired with prayer and almsgiving as one of the three great Lenten practices preparing the soul for Easter (CCC 1438).

Following Christ's Example in the Desert

Lent's forty days recall the forty days Jesus spent fasting in the wilderness before beginning His public ministry. Scripture tells us, "And when he had fasted forty days and forty nights, afterwards he was hungry" (Matthew 4:2). In imitating this fast, Catholics unite themselves to Christ's own self-emptying and preparation for His mission, entering the desert with Him spiritually before celebrating His Resurrection at Easter.

This pattern echoes earlier biblical fasts of forty days by Moses and Elijah, showing that fasting has long been a way God's people prepare to encounter Him more deeply.

A Form of Penance and Conversion

Fasting is one of the ways the Church has always practiced penance for sin, alongside prayer and almsgiving (CCC 1434). Jesus assumes His followers will fast, saying "when you fast, be not as the hypocrites, sad" (Matthew 6:16), teaching that fasting should be done quietly, for God's sake rather than for show. Lenten fasting is thus an outward sign of an interior conversion of heart, a turning away from sin and toward God (CCC 1430).

By denying the body a legitimate good like food, the faithful practice self-mastery, curb disordered attachments, and express sorrow for sin in a concrete, bodily way rather than merely an internal feeling.

Ordering Desires and Growing in Charity

Fasting trains the will to govern bodily appetites so that the soul is freer to seek God. It teaches dependence on "every word that proceedeth out of the mouth of God" rather than on bread alone (Matthew 4:4), reordering priorities toward the eternal over the merely comfortable.

The Church also links fasting closely to almsgiving: what is saved by eating less is meant to be given to those in need, so that Lenten discipline bears fruit in charity toward the poor, not merely private virtue (CCC 1434, 2043).

The Church's Current Discipline

Canon law requires fasting (one full meal and two smaller meals, with no food between) on Ash Wednesday and Good Friday for Catholics ages 18-59, and abstinence from meat on Ash Wednesday and all Fridays of Lent for those 14 and older. The Church encourages additional voluntary fasting and sacrifice throughout Lent as each person's health and state in life allow, always as a means to holiness rather than an end in itself (CCC 2043).