The Biblical Concept of Fasting

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Fasting, though often viewed as a hallmark of religious devotion, must be understood through the lens of scriptural teaching, not through tradition or personal emotion. In the Bible, fasting is never portrayed as a means to earn God’s favor or to manipulate His will. Rather, it is a voluntary act that can accompany prayer, repentance, or spiritual focus when practiced with humility and sincerity. Importantly, the Scriptures neither command nor forbid fasting for Christians today. Thus, its use must always be evaluated based on motive, context, and conformity to revealed truth.

Old Testament Foundations of Fasting

The Hebrew Bible provides a foundational understanding of fasting as both a communal and individual practice, often performed in times of distress, mourning, or repentance. The most direct and legislated fast is the Day of Atonement, described in Leviticus 16:29–31: “This is to be a lasting ordinance for you: On the tenth day of the seventh month you must deny yourselves and not do any work.” The Hebrew phrase translated “deny yourselves” (וְעִנִּיתֶם אֶת־נַפְשֹׁתֵיכֶם, we’innitem et-nafshotekhem) is understood by comparison with Isaiah 58:3 to refer to fasting.

Fasting is also associated with national crises and divine judgment. When Nineveh heard Jonah’s message, “they proclaimed a fast and put on sackcloth” (Jonah 3:5). Similarly, Ezra proclaimed a fast for safe travel (Ezra 8:21–23), and Daniel fasted while confessing Israel’s sins and seeking understanding (Daniel 9:3). In each case, fasting was not ritualistic but expressive of deep humility before Jehovah.

New Testament Practice and Clarification

In the New Testament, fasting appears during pivotal moments but is never institutionalized or commanded. Jesus fasted for 40 days following His baptism (Luke 4:1–2), preparing Himself for public ministry. The early church fasted when appointing elders (Acts 14:23), signaling the seriousness of the task, not a normative ritual. Notably, the only required fast under Mosaic Law—the Day of Atonement—was rendered obsolete by Jesus’ atonement on the cross, as Hebrews 9:24–26 teaches.

Jesus did not oppose fasting but corrected misuse. In Matthew 6:16–18, He condemned those who fasted “to be seen by others.” Proper fasting was to be done privately, between the individual and God. Luke 18:9–14 records Jesus’ parable of the Pharisee and the tax collector, showing that fasting, when used to elevate oneself, results in condemnation rather than approval.

Jesus also explained that His disciples would fast after His death, but this was descriptive, not prescriptive. “The days will come when the bridegroom is taken away from them, and then they will fast” (Matthew 9:15). Nowhere does He command Christians to fast, nor does the New Testament enjoin fasting for specific days or seasons.

The Role of Fasting in Christian Life

Fasting, when rightly understood, may be an optional spiritual discipline, not a requirement. Paul makes this clear in Romans 14:3–4: “Let not the one who eats despise the one who abstains… Who are you to pass judgment on the servant of another?” This affirms individual liberty in such matters. Similarly, Colossians 2:16–17 warns against imposing religious observances such as dietary laws or special days.

The motive is decisive. Biblically acceptable fasting is linked with:

Seeking God’s help (Ezra 8:21)
Deep spiritual focus (Luke 4:1–2)
Genuine repentance (Joel 2:12–15)

Yet fasting becomes illegitimate when used:

To impress others (Matthew 6:16)
To exalt self-righteousness (Luke 18:12)
To compensate for willful sin (Isaiah 58:3–5)

In Isaiah 58:6–7, God declares the fast He chooses: “To loose the bonds of wickedness, to undo the straps of the yoke, to let the oppressed go free… to share your bread with the hungry.” True fasting must be accompanied by obedient living and genuine concern for righteousness.

Fasting and the Atonement

One must not conflate Christian fasting with Old Covenant rituals. Jesus’ once-for-all sacrifice permanently fulfilled what the Day of Atonement foreshadowed (Hebrews 9:26; 1 Peter 3:18). Therefore, fasting is no longer required on any specific date or in association with atonement. The New Testament church does not observe ritual fasts in remembrance of Jesus’ death. Rather, Christians “proclaim the Lord’s death until he comes” through the Memorial, or Lord’s Supper, marked by solemn gratitude—not hunger (1 Corinthians 11:23–26). Paul explicitly corrects the misuse of the occasion: “If anyone is hungry, let him eat at home” (1 Corinthians 11:34).

Misconceptions about Fasting

Several common misconceptions must be rejected in light of biblical evidence:

Paul did not command fasting in 1 Corinthians 7:5. The reference to fasting in some translations (e.g., KJV) is based on later textual additions. The oldest and most reliable Greek manuscripts omit it, as confirmed by textual scholars such as Bruce Metzger. The verse refers solely to abstaining from marital relations for a time of prayer.
Fasting to commemorate Jesus’ 40 days in the wilderness lacks biblical warrant. Jesus never instructed this, and early Christians did not observe such a practice. Historical records show that Lent as a 40-day period only emerged centuries later, likely as a result of ecclesiastical tradition, not apostolic command.
Fasting during the Lord’s Supper is unscriptural. Jesus ate the Passover meal with His disciples, instituted the memorial with bread and wine, and gave no instruction to abstain from eating during the commemoration (Luke 22:14–20). Fasting at such an occasion would contradict His expressed intent.

Christian Liberty and the Joy of Worship

While fasting can be a meaningful private discipline, it must not replace or obscure the joyful nature of Christian worship. The fruits of the Spirit include “joy” (Galatians 5:22), and Paul refers to Jehovah as “the happy God” (1 Timothy 1:11). Ecclesiastes 3:12–13 affirms that God wants people to rejoice in their labor and in the gifts He provides. Christianity is not a religion of gloom and asceticism. It is a faith grounded in redemption, hope, and joy.

Conclusion: Fasting—Optional, Not Obligatory

The biblical concept of fasting affirms that when done with the right heart, it can be a legitimate expression of humility, dependence, or repentance. However, fasting is never commanded for Christians, nor is it linked with earning favor, displaying piety, or fulfilling ritual. As with all acts of devotion, the heart motive is paramount. Any benefit derived from fasting must flow from a love of truth and a sincere desire to align one’s will with God’s revealed Word.

For believers today, the greatest guidance and transformation come not through voluntary abstinence from food, but through feasting on the Word of God. As Jesus said, “Man shall not live by bread alone, but by every word that proceeds from the mouth of God” (Matthew 4:4). Let Scripture, not fasting, be your source of spiritual strength and clarity.

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About the Author

EDWARD D. ANDREWS (AS in Criminal Justice, BS in Religion, MA in Biblical Studies, and MDiv in Theology) is CEO and President of Christian Publishing House. He has authored over 220+ books. In addition, Andrews is the Chief Translator of the Updated American Standard Version (UASV).