What is fasting and how does it relate to prayer?

Fasting is the voluntary decision to go without food, or sometimes another regular comfort, for a specific period of time in order to focus more fully on God. It is woven throughout Scripture as a natural companion to prayer, especially in moments of great need, decision, or repentance. The two practices are so often paired that they function almost as a single spiritual act: fasting sharpens and intensifies prayer.

Before leading a dangerous journey back to Jerusalem with the temple treasures, Ezra writes, “So we fasted and petitioned our God about this, and he answered our prayer” (Ezra 8:23). The fast was not separate from the prayer; it was the physical form the prayer took.

Food is one of our most basic, recurring needs, and its absence has a way of exposing how dependent we actually are on physical comfort and routine. When hunger interrupts your day, it becomes a persistent, physical reminder to turn your attention back to God rather than to your usual distractions. Every pang can become a fresh prompt to pray.

Fasting also has a way of quieting other appetites and giving prayer room to breathe. Jesus assumed His followers would fast, saying “when you fast” rather than “if you fast” (Matthew 6:16-18), treating it as a normal, expected practice — provided it is done for God’s sake rather than to be admired by others.

Scripture repeatedly shows fasting paired with prayer at pivotal moments. Before sending out Barnabas and Saul on their first missionary journey, the leaders in Antioch were “worshiping the Lord and fasting” when the Holy Spirit spoke directly, setting the two apart for the work (Acts 13:2-3). The early church treated fasting as a way to slow down, clear away distraction, and listen more carefully for God’s direction before major decisions.

Fasting also appears in seasons of crisis and repentance. When Nineveh heard Jonah’s warning, the whole city, from the king down, fasted and turned from evil, and “God relented and did not bring on them the destruction he had threatened” (Jonah 3:5-10). Esther called the Jewish community to fast together for three days before she risked her life to approach the king on their behalf (Esther 4:16).

Fasting is not a bargaining chip that forces God’s hand, and Scripture is sharply critical of fasting reduced to empty ritual. Isaiah rebukes a fasting people who quarrel and oppress workers even while going hungry for show: “Is this the kind of fast I have chosen, only a day for people to humble themselves?... Is not this the kind of fasting I have chosen: to loose the chains of injustice...?” (Isaiah 58:3-6). God cares far more about a humble, obedient heart than about the physical act of hunger itself.

Jesus made the same point about motive, warning against fasting to look impressive: “when you fast, do not look somber as the hypocrites do... but when you fast, put oil on your head and wash your face, so that it will not be obvious to others that you are fasting” (Matthew 6:16-17). Fasting is meant to be between you and God, not a public display of spirituality.

When John’s disciples asked why Jesus’ disciples did not fast the way they and the Pharisees did, Jesus answered with an image of a wedding: “How can the guests of the bridegroom mourn while he is with them? The time will come when the bridegroom will be taken from them; then they will fast” (Matthew 9:15). His presence with His disciples during His earthly ministry was a season of joy that made fasting, which often expresses mourning or urgent need, less fitting in that moment.

But Jesus’ words also anticipate His departure — His death, resurrection, and ascension — after which fasting becomes fitting again for His followers, as they long for His return and depend on Him in His physical absence. This is part of why the church, from Acts onward, continued to fast (Acts 13:2-3; 14:23): not because Christ’s finished work made fasting obsolete, but because it still gives voice to holy longing between His first and second coming.

You do not need a crisis to begin fasting. Many believers set aside a regular period — a meal, a day, or longer — to pair with focused prayer over a specific need, decision, or season of spiritual dryness. The goal is not the hunger itself but what the hunger clears space for: extended, undistracted attention on God.

If you have never fasted, start modestly and prayerfully, perhaps skipping one meal to spend that time in prayer and Scripture instead, watching how the physical discipline sharpens your spiritual focus. Fasting will not manipulate God into agreement, but it can deepen your own hunger for Him, which is often exactly what a stalled prayer life needs.