Short answer: In Matthew 6:16–18 Jesus speaks to his disciples about fasting as something they will do, not something they must be talked into. He warns against the hypocrites, who disfigure their faces so others will notice their fasting, and says their visible reward is all they get. Instead, the disciple is to fast without advertising it, trusting the Father who sees in secret. The passage turns the question around: rather than scanning for who is fasting tomorrow, it asks each of us about our own motive before God.
Where fasting fits in the sermon on the mount
Matthew 6:16–18 sits inside the Sermon on the Mount, Jesus' extended teaching to his disciples about life under the rule of heaven. The surrounding verses show the shape of the whole section: three religious practices, giving, prayer and fasting, each handled with the same warning against performing devotion to be noticed, and each closing with the same promise of reward from the Father who sees in secret. Jesus speaks as one with authority, not as a scribe citing precedents. He assumes his hearers already fast and already give and pray. The question is not whether these practices exist among his people but who they are for.
The immediate context keeps the passage from becoming technique. Just before, Jesus ties the Father's forgiveness to our forgiving of others, so the one who fasts stands as a forgiven and forgiving person, not a performer earning a hearing. Just after, he warns against laying up treasure on earth and calls for treasure in heaven. Fasting lands between those two, in a place where the heart's real treasure shows itself. First-century Jewish devotion gave fasting an established place, and public piety could be staged. Jesus does not abolish the practice. He redirects its aim away from human observers and toward the Father.
The literary shape is a contrast built on a repeated pattern. Jesus describes the hypocrites with sad faces, disfiguring themselves so others will see they are fasting, and he says plainly that they have their reward already. Over against that he gives a quiet counter-instruction: anoint your head and wash your face, ordinary grooming that hides the discipline rather than advertising it. The point is not secrecy for its own sake but an audience of one. Fasting is a voluntary discipline, never a measure of spiritual standing, and anyone with medical conditions or a history of disordered eating should seek appropriate medical counsel before taking it up.
Matthew 6:16–18 belongs to the Sermon on the Mount, Jesus' extended teaching to his disciples about the life of the kingdom of heaven. The verses around it reveal the pattern of the whole section: three religious practices, giving, prayer and fasting, each carrying the same warning against doing righteousness to be noticed, and each ending with the same promise of reward from the Father who sees in secret. Jesus speaks as one with authority, not as a teacher quoting earlier authorities. He assumes his hearers already fast, give and pray. The question is not whether these practices exist among his people but who they are finally for.
The nearby context keeps the passage from collapsing into technique. Just before, Jesus binds the Father's forgiveness to our forgiving of others, so the person who fasts stands as one forgiven and forgiving, not as a performer earning a hearing. Just after, he warns against laying up treasure on earth and calls for treasure in heaven. Fasting sits between those two, one place where the heart's treasure becomes visible. In first-century Jewish devotion fasting was established, and public piety could be staged for an audience. Jesus does not abolish the practice. He redirects its aim from human observers to the Father.
The literary shape is a contrast built on a repeated pattern. Jesus pictures the hypocrites with sad faces, disfiguring themselves so others will notice they are fasting, and he says plainly that they have received their reward. Against that he sets a quiet counter-instruction: anoint your head and wash your face, ordinary grooming that conceals the discipline instead of advertising it. The aim is not secrecy for its own sake but an audience of one. Fasting remains a voluntary discipline, never a measure of spiritual standing, and anyone with medical conditions or a history of disordered eating should seek appropriate medical counsel before taking it up.
Fasting for an audience of one
Jesus opens this section with the word moreover, tying fasting to the giving and praying he has just described. The word rendered fast means going without food for a religious purpose, and Jesus treats it as ordinary practice, not an exception: he says when you fast, not if. He assumes his disciples will do it. What he targets is not the discipline but the performance. The hypocrites he names are people whose religious acts are staged for an audience. They disfigure their faces, making themselves look miserable on purpose, so that others will notice their devotion. The problem is the theater, not the going without food.
The phrase seen by men names exactly the audience the hypocrite wants, and Jesus says that audience is the whole payment: they have received their reward. Over against that stands the Father who is in secret. The contrast is not between public and private as such but between being watched by people and being seen by God. So the instruction is concrete: anoint your head and wash your face, the ordinary grooming of a normal day. Do not arrange your appearance to advertise the fast. The Father sees what is unseen, and Jesus presents the two rewards, the applause of people and the Father's reward, as genuinely different outcomes.
Two cautions belong with this text. First, Jesus is not measuring spirituality by how little a person eats. Fasting here is a voluntary discipline, not a test of standing before God, and the grace that saves is God's action in Christ, not our hunger. Second, going without food can genuinely harm people with medical conditions or disordered eating. If that is your situation, seek appropriate medical counsel; skipping meals is not a command you owe anyone. What this passage does command is honesty about why we do what we do: whether our devotion is aimed at the Father who sees in secret or at the people we hope are watching.
The reward language here is not a promise of health, wealth, or visible success. Jesus simply says the Father sees and the Father rewards, and he leaves the shape of that reward in the Father's hands. That is enough to free a person from managing an audience. If no one knows you fasted, nothing has been lost, because the one who matters already knows.
Fasting without an audience
Jesus does not argue for fasting here; he assumes it. The sentence begins with “when you fast,” not: if you fast, and the same pattern appears in the giving and prayer that precede it. In first-century Jewish devotion fasting was an established practice, and public piety could be performed for onlookers. Jesus does not abolish the practice. He redirects its aim. The hypocrites in 6:16 disfigure their faces so that people will notice they are fasting, and Jesus says plainly that their visible reward is all they get. The disciple is to anoint the head and wash the face, ordinary grooming, so that the fasting is not seen by men but by the Father who sees in secret.
The surrounding verses keep this from becoming a technique. Just before, Jesus ties the Father's forgiveness to our forgiving others, so the secret room is not a place to hide an unforgiving heart. Just after, in 6:19–20, he warns against laying up treasures on earth and calls for treasure in heaven. Fasting is one place where the heart's treasure becomes visible: whose attention do I actually want? The three practices share one warning, that righteousness done to be noticed has its reward already. The passage therefore turns the question of who is fasting away from inspecting others and toward examining my own motive before God.
Fasting is a voluntary discipline, not a measure of spiritual standing, and it can harm people with medical conditions or disordered eating; readers should seek appropriate medical counsel and treat any decision about food with care. What the passage claims stays central: the Father sees what is hidden and rewards it, and that hidden attention is worth more than human approval. The grace comes first. We fast not to earn the Father's notice but because he already sees us in secret. Our part is to keep the practice honest, aimed at him rather than at an audience.
Where readers disagree about Jesus' words on fasting
Jesus begins with the words "Moreover when you fast," which assumes his followers will fast without setting a day, a frequency, or an obligation. Some readers hear in this an expectation that fasting belongs to normal discipleship, while others point out that the New Testament never commands it and treat it as a voluntary discipline. Both sides can agree on what the text actually does: it gives no calendar and no minimum. The verse addresses how to fast, not how often. That silence matters, because it keeps fasting from becoming a test of spiritual standing.
The promise at the end raises another question. Jesus says the Father who sees in secret will reward you, and readers differ over whether that means a specific return or simply the Father's faithful response to hidden obedience. The text does not itemize the reward, and it does not promise health, insight, or any measurable benefit. What it does say is that the reward comes from the Father, not from the audience. The contrast in 6:16 is between those who receive their reward in full from people watching and those who leave the outcome to God.
A third disagreement concerns visibility. Some read this as a ban on anyone knowing you fast; others note that Jesus targets the motive of being seen, not the fact that others may learn. The instructions in 6:17–18 about anointing the head and washing the face point to ordinary appearance, not disguise. What stays central is direction: fasting is aimed at the Father, and hiddenness guards the heart from trading devotion for approval. Because fasting can harm some bodies, it belongs among voluntary disciplines, undertaken with wise counsel and never as a measure of standing before God.
A third disagreement concerns visibility. Some read this as a ban on anyone knowing you fast; others note that Jesus targets the motive of being seen, not the fact that others may learn. The instructions in 6:17–18 about anointing the head and washing the face point to ordinary appearance, not disguise. What stays central is direction: fasting is aimed at the Father, and hiddenness guards the heart from trading devotion for approval. Because fasting can harm some bodies, it belongs among voluntary disciplines, undertaken with wise counsel and never as a measure of standing before God.
The Father who sees in secret
Jesus has just taught his disciples to pray, and he immediately turns to fasting. The practice was assumed, not commanded here: he says when you fast, not if. What he targets is the performance, the sad faces and disfigured looks arranged so that others notice. The hypocrites he describes are not failing to fast; they are fasting for an audience. Jesus does not abolish the discipline. He redirects it, telling his disciples to anoint the head and wash the face, ordinary grooming that leaves no signal. The fast becomes invisible to people and visible only to the Father who sees in secret.
The one giving this instruction is the Son who was led into the wilderness and fasted there for forty days. In that account he refuses to turn stones into bread to prove himself, and he refuses the spectacle the tempter offers. His own fasting was not a display before a crowd but obedience to the Father. So his words here are not the advice of an outsider scoring religious technique. He describes the sincerity he himself embodied, and he exposes the performed religion that cannot produce it. The reward he names is not a prize we earn but the Father's own attention, and access to that Father is opened through Christ, not through the quality of our fasting.
This passage does not make fasting a means of salvation or a measure of spiritual standing. It shapes people who have already been brought near to God through Christ, teaching them to practice a voluntary discipline before the Father rather than before an audience. Fasting can genuinely harm some bodies, so readers with medical conditions or a history of disordered eating should seek appropriate medical counsel and treat the practice as optional. The Father who sees in secret is not watching for a performance. He is the Father Christ has made known to us.
Fasting before the Father who sees in secret
Jesus assumes his disciples will fast. In 6:16 he says "when you fast," not if, and the instruction that follows is about direction rather than technique. The hypocrites in view disfigure their faces so that others will notice. Their fast is real, but it is aimed at an audience. Jesus says they have their reward already. The disciple is told instead to anoint the head and wash the face, ordinary grooming that hides the fast rather than advertises it. The point is not secrecy for its own sake but who is watching. A fast can be sincere and still quietly arranged for notice.
So the first question for anyone asking who is fasting tomorrow is not which day or which food but who the fast is for. Plan it quietly. Do not announce it, and do not let the day become a signal to others. Where the desire to be seen turns up, bring it to God rather than managing appearances. Jesus grounds this in the Father who sees in secret. Obedience does not need an audience, and the disciple stands on grace, not on the fast itself. Nothing here promises a particular result beyond the Father's reward, so fast trusting his wisdom about outcomes.
Fasting is a voluntary discipline, not a measure of spiritual standing, and it is not safe for everyone. If you have a medical condition or a history of disordered eating, seek appropriate medical counsel before deciding anything, and treat any decision as a matter of freedom before God. The passage gives no timetable and no rule about food. It gives a direction: the Father sees, and that is enough. Whether you fast tomorrow or not, the heart examined and brought into the open before God is the response this text asks for.
Biblical fidelity check
Read closely, Matthew 6:16–18 sits inside the Sermon on the Mount, where Jesus has just addressed giving and prayer. The wording matters: he says when you fast, not if, and he assumes his followers will fast without fixing a day or frequency. The risk here is turning a description of normal practice into a law with a calendar, or turning the warning against display into a ban on anyone ever knowing. Jesus targets the motive, the disfigured face staged for an audience. The Father who sees in secret is the one being addressed.
Evangelical readers genuinely differ on whether Jesus commands fasting for the church or assumes it as a voluntary discipline, and on whether the reward is a specific return or simply the Father's faithful response to hidden obedience. What stays central across those differences is direction and audience: fasting is aimed at the Father, secrecy guards the heart from performing, and human approval is a poor wage. Jesus does not promise that hidden obedience brings comfort or visible success, only that the Father sees.
Reading Matthew 6:16-18 alongside other passages
These verses sit inside the Sermon on the Mount, where Jesus keeps pressing his disciples from outward performance toward the heart. For further study, compare the Lord's teaching on prayer just before this passage Jesus Denounces Hypocrisy in Matthew 23, his words on treasure and anxiety that follow Matthew 1: Genealogy and Birth of Jesus, and the wider biblical pattern of fasting as a voluntary seeking of God Matthew 10: Jesus Sends the Twelve with Authority. It also helps to read this alongside Jesus' teaching on humility and reward elsewhere in the Gospels Matthew 12: Lord of the Sabbath and Sign of Jonah.
Frequently asked questions
Does the Bible say Christians must fast, and how often?
Matthew 6:16–18 does not command a set number of fasts, and it names no required frequency. What it does show is that Jesus assumes his disciples will fast, since he says "when you fast" rather than: if you fast, and he gives instructions for how to do it. Fasting appears elsewhere in Scripture as a voluntary response to grief, repentance, prayer and seeking God, not as a fixed calendar obligation. So the passage rules out both advertising your fasting and measuring your spiritual standing by how often you do it.
What does it mean that the Father sees in secret?
It means God's attention does not depend on a human audience. In Matthew 6:18 Jesus contrasts being seen by people with being seen by the Father who is in secret, and he promises that this Father who sees in secret will reward. The point is not that God spies on private moments but that hidden faithfulness is genuinely observed and answered by him. This frees the disciple from needing anyone else to notice, because the one who matters already does.
Is it wrong to tell someone you are fasting?
Matthew 6:16–18 warns against fasting in order to be seen by people, not against every mention of it. Jesus targets the hypocrites who disfigure their faces so their fasting will be noticed, and he says they have received their reward in that notice. The question to ask is whether telling someone serves love and honesty or serves your own reputation. Where a plain answer is needed, give it without turning the fast into a performance.
