Fast; Fasting
The Origins of Fasting
Fasting in the biblical world began as a natural response to deep distress. Intense grief, sorrow, or anxiety naturally suppresses appetite, and this instinctive reaction became a deliberate spiritual practice. Hannah wept and did not eat because of her anguish over childlessness (1 Samuel 1:7). Jonathan refused food out of anger over his father's treatment of David (1 Samuel 20:34). Ahab sulked and refused bread when Naboth would not sell his vineyard (1 Kings 21:4). From these natural expressions of distress, fasting evolved into a recognized way of demonstrating sincerity before God and others.
Fasting in the Old Testament
The Mosaic law prescribed only one fast: the Day of Atonement, when Israel was commanded to "afflict your souls" (Leviticus 16:29-31; 23:27). Beyond this annual observance, fasting was practiced on many occasions. Moses fasted forty days on Mount Sinai (Exodus 34:28). David fasted when his child was ill (2 Samuel 12:16) and to mourn Abner's death (2 Samuel 3:35). The entire nation fasted during times of military crisis (Judges 20:26; 1 Samuel 7:6) and national repentance (Jonah 3:5-8). After the Babylonian exile, four additional annual fasts were established to commemorate the destruction of Jerusalem (Zechariah 8:19). Fasting was typically accompanied by other signs of mourning such as wearing sackcloth and putting ashes on the head.
The Prophetic Critique of Fasting
The prophets sharply criticized fasting that was merely outward ritual without genuine repentance or justice. Isaiah 58 contains the most powerful prophetic statement on fasting, where God declares that the fast he chooses is not bowing one's head like a reed but loosing the bonds of wickedness, letting the oppressed go free, sharing bread with the hungry, and clothing the naked (Isaiah 58:5-7). Zechariah similarly questioned whether Israel's commemorative fasts were truly directed toward God or were merely self-serving rituals (Zechariah 7:5-6). The prophets did not reject fasting itself but demanded that it be accompanied by genuine transformation of heart and conduct.
Jesus and Fasting
Jesus fasted forty days in the wilderness before beginning his public ministry, echoing the fasts of Moses and Elijah (Matthew 4:1-2). He assumed his disciples would fast, saying "when you fast" rather than "if you fast" (Matthew 6:16-18), but he taught that fasting should be private rather than ostentatious. When asked why his disciples did not fast like the Pharisees and John's disciples, Jesus compared his presence to a wedding feast: fasting is inappropriate while the bridegroom is present, but "the days will come when the bridegroom is taken away, and then they will fast" (Mark 2:19-20). He also taught that some kinds of spiritual opposition require prayer accompanied by fasting (Mark 9:29).
Fasting in the Early Church
The early church continued the practice of fasting. The leaders at Antioch were fasting and praying when the Holy Spirit directed them to set apart Barnabas and Saul for missionary work (Acts 13:2-3). Paul and Barnabas appointed elders in each church with prayer and fasting (Acts 14:23). Paul himself experienced many fastings during his ministry (2 Corinthians 11:27). The early church understood fasting as a way of sharpening spiritual focus, expressing dependence on God, and preparing for important decisions.
The Purpose and Practice of Fasting
Throughout Scripture, fasting serves several purposes: expressing grief and repentance (Joel 2:12), seeking God's guidance and intervention (Ezra 8:21-23), preparing for spiritual confrontation (Matthew 4:1-2), and deepening devotion and prayer (Luke 2:37). The consistent biblical teaching is that fasting has value not as a way to earn God's favor but as an expression of sincere dependence on him. When combined with genuine prayer, humility, and just action, fasting remains a powerful spiritual discipline.
Biblical Context
Fasting appears throughout Scripture: in the Mosaic law on the Day of Atonement (Leviticus 16:29), in the historical books during times of crisis and mourning (Judges 20:26; 1 Samuel 7:6; 2 Samuel 12:16), in the prophets' critique of empty ritual (Isaiah 58; Zechariah 7), in Jesus' wilderness temptation and teaching (Matthew 4:1-2; 6:16-18), and in the early church's practice (Acts 13:2-3; 14:23).
Theological Significance
Fasting expresses human dependence on God by temporarily setting aside physical needs to focus on spiritual ones. The prophetic critique of fasting (Isaiah 58) teaches that no spiritual practice has value apart from genuine righteousness and compassion. Jesus' teaching on fasting emphasizes that it should flow from sincere devotion rather than religious performance, pointing to the heart transformation that God desires.
Historical Background
Fasting was practiced across the ancient Near East as a religious observance. In Israel, the Day of Atonement was the only biblically mandated fast, but custom added many more, especially after the exile. By the first century, devout Pharisees fasted twice a week (Luke 18:12), typically on Mondays and Thursdays. The Didache, an early Christian document, instructed Christians to fast on Wednesdays and Fridays instead, to distinguish their practice from the synagogue.