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What does the Bible say about fasting?

What Christian writers said, from about AD 174 to 1918.

49 passages · 27 writers · 8 centuries

The short answer

Scripture records fasts of forty days by Moses, Elijah, and Christ, which writers read together. Old Testament fasts were called in repentance and public danger, as in Joel, Daniel, Esther, and Nineveh. Writers say a fast without a changed heart is rejected, as Zechariah and Joel show. Asked why his disciples did not fast, Christ said they would fast once the bridegroom was taken away. In Acts the church fasts when it sends out Paul and Barnabas, and Augustine and Ryle note that the New Testament sets no rule for days.

The forty-day fasts of Moses, Elijah, and Christ

12 passages · 10 writers · 100s to 1800s

Augustine, Chrysostom, Calvin, Matthew Henry, and others read the three forty-day fasts together and say why Christ fasted.

c. 210–220 · Tertullian, On Fasting (De ieiunio adversus psychicos) 6

On the other hand, he whose “heart” was habitually found “lifted up” rather than fattened up, who in forty days and as many nights maintained a fast above the power of human nature, while spiritual faith subministered strength (to his body), both saw with his eyes God’s glory, and heard with his ears God’s voice, and understood with his heart God’s law: while He taught him even then (by experience) that man liveth not upon bread alone, but upon every word of God; in that the People, though fatter than he, could not constantly contemplate even Moses himself, fed as he had been upon God, nor his leanness, sated as it had been with His glory! Deservedly, therefore, even while in the flesh, did the Lord show Himself to him, the colleague of His own fasts, no less than to Elijah. For Elijah withal had, by this fact primarily, that he had imprecated a famine, already sufficiently devoted himself to fasts: “The Lord liveth,” he said, “before whom I am standing in His sight, if there shall be dew in these years, and rain-shower.” Subsequently, fleeing from threatening Jezebel, after one single (meal of) food and drink, which he had found on being awakened by an angel, he too himself, in a space of forty days and nights, his belly empty, his mouth dry, arrived at Mount Horeb; where, when he had made a cave his inn, with how familiar a meeting with God was he received!

1710–1714 · Matthew Henry, Commentary on Matthew 4.1-11

He was dieted for the combat, as wrestlers, who are temperate in all things (1 Cor. ix. 25); but Christ beyond any other, for he fasted forty days and forty nights, in compliance with the type and example of Moses the great lawgiver, and of Elias, the great reformer, of the Old Testament. John Baptist came as Elias, in those things that were moral, but not in such things as were miraculous (John x. 41); that honour was reserved for Christ. Christ needed not to fast for mortification (he had no corrupt desires to be subdued); yet he fasted, (1.) That herein he might humble himself, and might seem as one abandoned, whom no man seeketh after.

Fasting in the Law and the Prophets

18 passages · 12 writers · 200s to 1800s

Tertullian, Leo, Calvin, and Matthew Henry expound the fasts of Joel, Daniel, Esther, Nineveh, and Israel, and what makes a fast acceptable or not.

440–461 · Leo the Great, Sermons (Tractatus) 88.1

Of what avail, dearly-beloved, are religious fasts in winning the mercy of God, and in renewing the fortunes of human frailty, we know from the statements of the holy Prophets, who proclaim that justice of God, Whose vengeance the people of Israel had again and again incurred through their iniquities, cannot be appeased save by fasting. Thus it is that the Prophet Joel warns them, saying, “thus saith the Lord your God, turn ye to Me with all your heart, with fasting and weeping and mourning, and rend your hearts and not your garments, and turn ye to the Lord your God, for He is merciful and patient, and of great kindness, and very merciful,” and again, “sanctify a fast, proclaim a healing, assemble the people, sanctify the church.” And this exhortation must in our days also be obeyed, because these healing remedies must of necessity be proclaimed by us too, in order that in the observance of the ancient sanctification Christian devotion may gain what Jewish transgression lost.

1559 · John Calvin, Commentary on Joel 2.1

Hence the Prophet addresses not each individually; but as all had done wickedly, from the least to the greatest, he bids the whole assembly to be called, that they might in common own themselves to be guilty before God, and deprecate his vengeance. It is the same as though the Prophet had said that there was no one among the people who could exempt himself from blame, for iniquity had prevailed through the whole body. But this passage shows that when any judgment of God is impending, and tokens of it appear, this remedy ought to be used, namely, that all must publicly assemble and confess themselves worthy of punishments and at the same time flee to the mercy of God. This, we know, was, as I have already said, formerly enjoined on the people; and this practice has not been abolished by the gospel. And it hence appears how much we have departed from the right and lawful order of things; for at this day it would be new and unusual to proclaim a fast.

1561 · John Calvin, Commentary on Daniel, part 2 (chapters 7-12) 10.2

This passage, then, though it asserts his abstinence from flesh and wine, need not imply actual fasting. Daniel’s method of living was clearly after the common practice of the Chaldeans, and by no means implies the rejection of wine, or flesh, or viands of any kind. When he says, he did not eat delicate bread, this was a symbol of sorrow and mourning, like abstinence from flesh and wine. Daniel’s object in rejecting delicate bread and wine during those three weeks, was not merely the promotion of temperance, but suppliantly to implore the Almighty not to permit a repetition of those sufferings to his Church under which it had previously labored.

Why the disciples did not fast (Matthew 9:14-15)

9 passages · 9 writers · 200s to 1800s

Chrysostom, Tertullian, Calvin, and Edersheim explain Christ's answer about the bridegroom.

c. 390 · John Chrysostom, Homilies on the Gospel of Matthew 30.4

“Why do we and the Pharisees fast oft, but thy disciples fast not?” This is the disease, which Christ long before was eradicating, in the words, “When thou fastest, anoint thy head, and wash thy face;”foreknowing the evils that spring therefrom. But yet He doth not rebuke even these, nor say, “O ye vainglorious and over-busy;” but He discourses to them with all gentleness, saying, “The children of the bride-chamber cannot fast, as long as the bridegroom is with them.”

c. 400 · Augustine of Hippo, The Harmony of the Gospels (De consensu evangelistarum) 2.27.63

Luke, again, does not say, “Can the children of the bridegroom fast?” but, “Can ye make the children of the bridegroom fast, while the bridegroom is with them?” By expressing it in this method, the evangelist has elegantly opened up the self-same sense in a way calculated to suggest something else. For thus the idea is conveyed, that those very persons who were speaking would try to make the children of the bridegroom mourn and fast, inasmuch as they would [seek to] put the bridegroom to death. Moreover, Matthew’s phrase, “mourn,” is of the same import as that used by Mark and Luke, namely, “fast.” For Matthew also says further on, “Then shall they fast,” and not, “Then shall they mourn.” But by the use of this phrase, he has indicated that the Lord spoke of that kind of fasting which pertains to the lowliness of tribulation. In the same way, too, the Lord may be understood to have pictured out a different kind of fasting, which stands related to the rapture of a mind dwelling in the heights of things spiritual, and for that reason estranged in a certain measure from the meats that are for the body, when He made use of those subsequent similitudes touching the new cloth and the new wine, by which He showed that this kind of fasting is an incongruity for sensual and carnal people, who are taken up with the cares of the body, and who consequently still remain in the old mind.

1883 · Alfred Edersheim, The Life and Times of Jesus the Messiah 3.28

The Bridegroom would be violently taken from them, and then would be the time for mourning and fasting. Not that this necessarily implies literal fasting, any more than it excludes it, provided the great principles, more fully indicated immediately afterwards, are contrary to the spirit of the joyous liberty of the children of God. It is only a sense of sin, and the felt absence of the Christ, which should lead to mourning and fasting, though not in order thereby to avert either the anger of God or outward calamity.

Anna, Paul, and the church in Acts

10 passages · 9 writers · 200s to 1900s

Calvin, Chrysostom, Wesley, and Augustine on fasting in the New Testament, including whether it sets a rule.

c. 400–401 · John Chrysostom, Homilies on the Acts of the Apostles 27

A great, yes a great good is fasting: it is circumscribed by no limits. When need was to ordain, then they fast: and to them while fasting, the Spirit spake. Thus much only do I enjoin: (I say) not fast, but abstain from luxury.

1552 · John Calvin, Commentary on Acts, part 1 (chapters 1-13) 13.3

When they had fasted and prayed. That they may obey the oracle, they do not only send Paul and Barnabas away; but also with a solemn rite they appoint them to be the apostles of the Gentiles; it is without question that this was a public fast. Luke said before, that they were fasting, forasmuch as they were busied in their ministry: it might be that that was according to the custom; but now there is another reason, for in appointing a public fast, which used to be done in hard matters and of great importance, they provoke both themselves and others unto an earnest ferventness in prayer, for this is oftentimes added in Scripture as a help to prayer; but (it was a matter of such weight to erect the kingdom of Christ amongst the Gentiles) the teachers of Antioch do not without cause earnestly pray the Lord, that he will enable his servants; and that was not the end of their prayer, that God would, by his Spirit of wisdom and discretion, govern their judgments in choosing, because all disputation or doubting concerning this matter was taken away; but that God would furnish those with the Spirit of wisdom and strength whom he had already chosen to himself, that he would strengthen them with his power against all the invasions of Satan and the world, that he would bless their labors, that they might not be unfruitful, that he would open a gate for the new preaching of the gospel.

1872 · John Wesley, Sermons on Several Occasions 27

I shall endeavour to show, First, what is the nature of fasting, and what the several sorts and degrees thereof. As to the nature of it, all the inspired writers, both in the Old Testament and the New, take the word to fast in one single sense, for not to eat, to abstain from food. This is so clear, that it would be labour lost to quote the words of David, Nehemiah, Isaiah, and the Prophets which followed, or of our Lord and his Apostles; all agreeing in this, that to fast, is, not to eat for a time prescribed.

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