Matthew 6:16-18 Fasting: Secret Devotion to God
Short answer: Fasting in Matthew 6:16-18 is a voluntary spiritual discipline in which a believer abstains from food, or another ordinary comfort, for a set time in order to seek God. Jesus frames fasting as something His followers will do, not something done for human applause. The passage does not command a schedule or a specific diet. It warns against making fasting a performance. When you fast, do not dress your face in a mournful expression like those who want to be noticed. Instead, keep it between you and your Father who sees in secret. Fasting is a matter of the heart, and the promise attached to it is the Father's reward, not human recognition. The rest of Scripture clarifies the motives and the fruit God actually desires.
The Sermon on the Mount Context of Matthew 6:16-18
Matthew 6 belongs to the Sermon on the Mount, Jesus' most concentrated teaching on the life of the kingdom of heaven. Beginning in chapter 5, He describes the character of blessed people, then He turns in chapter 6 to religious practice. Giving, prayer, and fasting appear side by side. Each one receives the same warning, the same contrast between seeking human notice and seeking the Father who sees in secret. The sequence matters because it shows that fasting belongs in the same category as prayer and generosity. It is not an exotic practice reserved for spiritual elites. It is a normal part of devotion for His disciples, and it is governed by the same concern for honest motives that governs the other two.
Before He addresses fasting, Jesus teaches on prayer, and He says to go into an inner room and shut the door. The Father sees what is done in secret. That principle carries directly into the next paragraph. When Jesus turns to fasting in verse 16, He says in effect that the same rule applies. Do not be like the hypocrites who make their fasting visible. The word hypocrite in this context means an actor, someone playing a part for an audience. The audience they want is other people. Jesus does not deny that such people are fasting. He denies that their fasting is directed toward God. They have chosen their reward, and they have it.
It is striking that Jesus says the Father sees in secret three times in this chapter, in the instructions on giving, prayer, and fasting. That refrain is the controlling idea. The God to whom we give, pray, and fast is not distracted. He is not dependent on public evidence. He sees what no one else sees, including the motives that even we barely understand. That is both a warning and a comfort. It warns against pretense, because hidden motives are fully exposed. It comforts the person whose fasting is unnoticed by everyone else, because nothing done for the Father is lost. The promise of reward is real, though Jesus does not specify what form it will take.
The Sermon on the Mount also sets the tone for how we should read this passage. Jesus is not adding hoops to be jumped through. He is forming a people whose righteousness exceeds the careful external performance of the scribes and Pharisees. That greater righteousness is not more rules but a deeper reality. To fast in your own house with a normal face, neither begging for attention nor putting on a show, is a small but real way of living toward God rather than toward a crowd. The passage assumes fasting, regulates its manner, and points to the Father who sees and rewards.
Don't Be Like the Hypocrites
The verb Jesus uses is descriptive. He speaks of those who disfigure their faces, making their appearance unrecognizable or unattractive so that others can tell they are fasting. That may include leaving the head unwashed, sprinkling ash, or pulling a pained expression. The point is not that misery is forbidden as an emotion. The point is that misery is being manufactured and displayed as a signal. The face becomes a billboard. The fast itself may be genuine as an act of abstaining, but the purpose has shifted. Instead of seeking God, the faster is seeking an audience. Jesus says such people have received their reward, meaning the recognition they wanted, and nothing more.
The contrast is plain. Do not look somber like the actors. Rather, when you fast, anoint your head and wash your face. In that culture, anointing the head and washing the face were ordinary practices of cleanliness and grooming. Jesus is not commanding a special ritual. He is saying, in effect, do the normal thing. Look like a normal person going about your day. Let your fasting be visible to God, not to your neighbors. The instruction is almost humorous in its homeliness: wash up, comb your hair, and get on with your life. The discipline remains, but the display is gone.
We should be honest that this warning applies to more than food. Anyone who has ever quietly mentioned a fast, or subtly let a hard day show because they have not eaten, knows the temptation. Social media has made it easier than ever to post about spiritual disciplines. The heart that wants approval can turn almost anything into a stage. Jesus is not against encouragement from trusted friends. He is against fasting that is designed to be seen. The test is simple. If no one noticed, would the fast still feel worthwhile? If the answer is no, the audience has quietly shifted from the Father to people.
There is another side to this. Some believers swing to the opposite error and never tell anyone anything, not out of humility but out of pride in their secrecy. Jesus is not asking us to hide our fasting from our families in a way that creates suspicion or deception. A spouse may need to know why dinner is skipped. A parent should not lie to a child. The issue is not information but motive. Secrecy for its own sake can become another performance. The goal is a heart that is content to be seen by God, even while living honestly with the people He has placed around us.
Why Fasting Is Expected, Not Merely Permitted
Notice the grammar. Jesus does not say if you fast, as though it were an optional extra for especially zealous people. He says when you fast. The same construction appears with giving and prayer. The assumption throughout the Sermon on the Mount is that His disciples will do all three. Fasting is treated as a normal expression of devotion, alongside prayer and generosity. The question is not whether a Christian ever fasts but how and why. Matthew 9:14-15 reinforces this. John's disciples ask Jesus why His disciples do not fast, and He answers with a question about the wedding guests. The days will come when the bridegroom is taken away, and then they will fast. The presence of Jesus was a season of celebration; the absence would be a season of longing.
That answer tells us something important about the nature of Christian fasting. It is not a technique for earning merit. It is a response to longing. The bridegroom has been taken away, and the church waits for His return. Fasting gives bodily expression to that waiting. It is grief and hope held together in the body. That is why fasting can feel simultaneously sad and right. The disciples of John were asking a fair question, and Jesus did not dismiss fasting. He located it in the right season. There is a time to feast and a time to fast, and the church now lives in the overlap, already rejoicing and not yet fully home.
Acts shows the early church taking this seriously. Acts 13:2-3 depicts a congregation at worship, and as they served the Lord and fasted, the Holy Spirit spoke, setting apart Barnabas and Saul for mission. Fasting here is not an isolated heroic act. It is part of the church's ordinary rhythm of worship, and it accompanies a decisive moment of guidance and sending. Later in Acts 14:23, elders are appointed with prayer and fasting. The New Testament does not lay down a law of fasting, but it also does not treat it as strange. It appears at turning points, in corporate settings, and in connection with prayer and mission.
So the honest summary is this. Fasting is expected in the sense that it belongs to the normal toolkit of Christian devotion, and it is voluntary in the sense that the New Testament gives no fixed schedule or command about frequency. Many faithful Christians fast weekly, others seasonally, others rarely. Some cannot fast from food for medical reasons and find other ways to abstain. The passage does not settle those differences. It settles the direction of the heart. When you fast, fast toward the Father.
Isaiah 58 and the Fast God Chooses
Matthew 6 and Isaiah 58 belong together, because both address the gap between religious activity and a changed life. In Isaiah 58:3, the people complain that they have fasted and God has not noticed. God's answer is that their fast is contradicted by their conduct. They pursue their own pleasure and oppress their workers. They quarrel and fight while bowing their heads like a reed. The fast God desires is not merely abstaining from food but loosening the bonds of wickedness, letting the oppressed go free, sharing bread with the hungry, and housing the poor. The prophetic critique is not that fasting is wrong. It is that fasting without mercy is a contradiction.
This is a necessary correction to any view of fasting as a private transaction with God. The Bible never treats spirituality as a substitute for justice. A person can skip meals and still be cruel at home, dishonest in business, or indifferent to the needy. Isaiah says such fasting is not humble at all. It is self-serving religion dressed in sackcloth. Jesus makes a similar point elsewhere when He condemns those who strain out a gnat and swallow a camel. The lesson is not to abandon fasting but to let it flow into love. A fast that makes us more patient, more generous, and more attentive to the poor is the kind of fast God is looking for.
At the same time, we must not turn Isaiah 58 into a ban on literal fasting, as if the only fast God accepts were social action. The passage assumes that the people were actually abstaining from food. God does not say, stop fasting and do justice instead. He says, your fasting is unacceptable while your hands are dirty. The two belong together. Fasting without mercy is hypocrisy. Mercy without any self-denial may become comfortable activism. The biblical vision is a people who humble themselves before God and then act with compassion toward their neighbors. The inner discipline and the outward fruit are meant to travel together.
Applied to Matthew 6, this means the private fast has public consequences. We do not fast to be seen, but a genuine fast changes how we treat others. It may make us gentler with a difficult coworker. It may free up money we would have spent on meals, which we can give to someone in need. It may soften our hearts toward people we have been neglecting. If our fasting leaves us just as harsh as before, Isaiah's question still stands. The Father who sees in secret is also the God who cares about how we treat the vulnerable.
The Rewards and Dangers of Fasting
Jesus promises that the Father who sees in secret will reward you. He does not specify the form. That vagueness is deliberate, and it should make us careful. Fasting is not a lever to force God's hand. It is not a way to guarantee a particular outcome, whether a job, a healing, or a breakthrough. The reward is the Father's to give, in His wisdom and timing. Sometimes the reward is a deeper sense of His presence. Sometimes it is clarity about a decision. Sometimes it is simply the quiet knowledge that we have obeyed. We should not fast in order to extract something from God, as though He could be manipulated by hunger.
The danger of fasting is that it can quietly become a source of pride. Paul warns in 1 Corinthians 7:5 about depriving one another, except by consent for a season, so that a couple may give themselves to fasting and prayer. Even in marriage, spiritual devotion can be turned into a claim of superiority or a tool of control. If fasting makes us feel more advanced than other believers, we have already lost the reward Jesus described. The tax collector who beat his chest and the Pharisee who thanked God he was not like other men both went to the temple to pray, but only one went home justified. Fasting is no different.
There is also a physical danger. Fasting from food is not wise for everyone. People with diabetes, eating disorders, pregnancy, or certain medications should not fast from food without medical guidance. The Bible does not command anyone to harm their body. Abstaining from food is one form of fasting, but it is not the only one. Someone can fast from social media, from entertainment, from a habitual comfort, or from sleep for a short season, dedicating that time to prayer. The principle is self-denial for the sake of seeking God, not a competition in severity. Wisdom and honesty about our own limits are part of faithful practice.
Finally, fasting is not a technique that guarantees spiritual intensity. Some fasts feel heavy and dry. Some are surprisingly ordinary. Feelings are not the measure. The measure is whether we are turning toward God with all our heart, as Joel 2:12-13 puts it, returning to Him with fasting, weeping, and mourning, and whether we are rending our hearts and not our garments. The fast God honors is the one offered to the Father in secret, whether or not we feel anything at all. The reward rests on His faithfulness, not on the quality of our experience.
How to Fast Without Making a Show
Begin with prayer and with a clear plan. Decide what you are abstaining from, for how long, and what you will do instead with the time or the hunger. If you skip a meal, you might spend that time in prayer, reading Scripture, or interceding for others. Write down a simple purpose, so the fast does not drift into mere dieting or into a vague discomfort. Tell God what you are seeking. If you live with others, decide in advance what you will say. You do not need to announce the reason, but you should not lie or create confusion. Honesty with family is not the same as advertising to an audience.
Keep your appearance normal. Eat normally when you are with others, unless that would be dishonest about your commitment. Do not post about it. Do not fish for concern. Do not compare your fast with anyone else's. If you slip and eat something, do not turn it into a drama. Acknowledge it to God and continue. Fasting is not a performance being scored. It is a season of seeking. The person who fasts quietly and imperfectly is better off than the person who fasts perfectly and posts about it. The Father sees in secret, and that is enough.
Let your fast be shaped by the needs around you. Isaiah 58 connects fasting with practical love. Perhaps during your fast you can give the money you would have spent on meals to a food bank or a family in need. Perhaps you can use the extra time to serve someone. Perhaps you can fast from criticism or from complaining. These are not replacements for seeking God, but they are fruits that show the fast is real. A fast that ends in a warmer home, a more generous hand, and a humbler heart has done its work. A fast that ends in hunger and pride has missed the point.
End well. When the fast is over, do not treat it as a trophy or as a debt God owes you. Return to ordinary life with gratitude. If the fast opened something in your heart, keep that door open in prayer. If nothing seemed to happen, leave the outcome with God. Many faithful Christians fast regularly, others fast at turning points, and some are providentially hindered from fasting at all. Scripture does not command a uniform practice. It commands a sincere heart. The Father who sees in secret is not impressed by our severity, and He is not fooled by our pretense. He is looking for people who seek Him.
When Christians Differ on Fasting
Faithful believers have not always agreed about fasting, and honesty requires us to say so. Some traditions set aside regular days, such as Fridays or the season of Lent, and treat them as normal Christian practice. Others emphasize freedom and warn against any rule that could become a new legalism. Both concerns have biblical support. The New Testament never prescribes a mandatory fast for all believers, and Paul warns against those who would judge others over food and drink. At the same time, Jesus says when you fast, and the early church fasted at significant moments. The disagreement is real, and it should be handled with charity rather than suspicion.
What we should not do is dismiss one another. The person who fasts regularly should not look down on the person who does not. The person who does not fast should not mock the one who does. Each belongs to the Lord, and each will give account to Him. Romans 14 addresses exactly this kind of dispute over days and food. The kingdom is not about rules of eating but about righteousness, peace, and joy in the Holy Spirit. If your fasting makes you a more loving person, it is bearing good fruit. If it makes you a more judgmental person, something has gone wrong. The test is the fruit, not the frequency.
What all can agree on is that fasting is meant to be directed to God. Whether you fast weekly, monthly, seasonally, or at a crisis, the question is whether you are seeking the Father or seeking an audience. That question is settled in the hidden place. It is answered when no one is watching and when nothing is posted. It is answered in the ordinary choices of a day: what you do with your hunger, your time, and your words. Matthew 6:16-18 does not tell us how often to fast. It tells us who is watching, and what kind of reward we are actually seeking.
If you have never fasted, you might begin with something small and honest. Skip one meal. Spend the time in prayer. Do not tell anyone. See what the Lord does in you. If you have fasted for years, you might ask whether the practice has become routine or self-congratulatory. The discipline is good, but the direction of the heart is what Jesus is after. Whether you eat or fast, do it unto the Lord. The Father who sees in secret will reward you, and His reward is better than any human recognition we could ever receive.
Biblical fidelity check
Matthew 6:16-18 establishes that fasting is a normal practice for disciples, that it must not be done to be seen by people, and that the Father who sees in secret will reward it. The passage does not establish a required frequency, a required duration, a specific diet, or a list of approved purposes. It does not say that fasting earns forgiveness or that it obligates God to answer a particular prayer. It does not say that fasting is more spiritual than prayer or giving, since all three appear in the same chapter under the same warning. It also does not say that fasting should always be hidden from everyone, since living honestly with family and church may require some communication. The passage governs motive and direction, not schedule.
A common misreading treats fasting as a technique for manipulating God, as though enough hunger could force a desired result. That is wrong because it turns a relationship into a transaction and makes the Father into a mechanism. Another misreading treats the warning against display as a command to be secretive in a way that deceives others, which is not what Jesus says. He says to wash your face and anoint your head, that is, to live normally. The reward belongs to the Father, and the fast belongs to Him. Anything that shifts the audience from God to people, or from trust to technique, has already departed from the passage.
Other passages that speak to Matthew 6:16-18
Several passages fill out what Matthew 6:16-18 assumes. The prophets and the apostles together show the motives, the community setting, and the fruit of fasting. For a broader survey of the biblical material, see Bible Verses About Fasting: A Scripture-First Guide for Christians. For how unity and humility shape the way we practice spiritual disciplines alongside other believers, see What Does 1 Corinthians 1:10 Mean? Context, Theology, and Application and What Does 1 Corinthians 1:9 Meaning? Context, Theology, and Application. For an overview of the letter's opening themes and how Christian devotion is grounded in God's call, see 1 Corinthians 1: Called, United, and Boasting in the Lord. Read together, these passages keep fasting in its proper place.
Frequently asked questions
Does Matthew 6:16-18 command Christians to fast?
The passage does not give a command with a schedule, but it does use the words when you fast, not if you fast, and it groups fasting with giving and prayer as expected devotion. So fasting is presented as normal for disciples, while the frequency and form are left open. The New Testament shows the early church fasting at key moments, such as in Acts 13:2-3, without prescribing a rule for everyone. Christians may differ on how often to fast, but the practice itself belongs to the biblical pattern of seeking God.
What does it mean to anoint your head and wash your face?
In the culture of Jesus' day, anointing the head and washing the face were ordinary acts of grooming and cleanliness. Jesus is not giving a ritual. He is telling His disciples to look normal while they fast, so that their abstaining is not turned into a public signal. The instruction contrasts with the hypocrites who disfigure their faces to be seen by men. The point is direction of the heart: your fast is for the Father who sees in secret, not for the crowd. Washing your face is a small, practical way of living that out.
Can I fast from something other than food?
The Bible's usual fast is from food, but the underlying principle is voluntary self-denial for the sake of seeking God. Many believers fast from social media, entertainment, or another comfort, especially when health or circumstances make food fasting unwise. Scripture does not give a list of approved substitutes, so this is a matter of wisdom and honesty. The essential thing is that the practice turns your heart toward God and expresses itself in love, not that it matches someone else's standard or severity.
