"Therefore also now, saith the LORD, turn ye even to me with all your heart, and with fasting, and with weeping, and with mourning:" — Joel 2:12 (KJV)
The short answer
The Bible presents fasting as humbling yourself before God — setting aside food to seek Him with focused hunger of heart. It is meant to be private and sincere, not for show, and is often joined to prayer and repentance. It is anchored in Matthew 6:16-18, Isaiah 58:6, and Joel 2:12.
Fasting can seem like an ancient or extreme practice, but the Bible treats it as a natural part of seeking God. To fast is to say, with your body as well as your words, that you hunger for God more than for bread. Scripture never presents it as a way to earn God's favor or twist His arm. It is a means of humbling the heart, sharpening prayer, and turning fully toward Him. Below are eight passages, quoted exactly from the King James Version, grouped around the questions people ask about fasting.
How does God want me to fast?
Jesus assumes His followers will fast — and He guards it from becoming a display. The reward of fasting is found in God's notice, not in others' admiration.
"Moreover when ye fast, be not, as the hypocrites, of a sad countenance: for they disfigure their faces, that they may appear unto men to fast. Verily I say unto you, They have their reward. But thou, when thou fastest, anoint thine head, and wash thy face; That thou appear not unto men to fast, but unto thy Father which is in secret: and thy Father, which seeth in secret, shall reward thee openly." — Matthew 6:16-18 (KJV)
Notice Jesus says "when ye fast," not "if." He expects it. But He wants it hidden — done "unto thy Father which is in secret." Fasting is between you and God, and He sees what no one else does.
"Therefore also now, saith the LORD, turn ye even to me with all your heart, and with fasting, and with weeping, and with mourning:" — Joel 2:12 (KJV)
Fasting here is bound up with returning to God "with all your heart." The point is never the empty stomach itself, but the whole heart turned back to the Lord in earnest.
What kind of fast does God choose?
Scripture warns that fasting can become hollow ritual. God links the fast He desires to a changed life — humbled before Him and merciful toward others.
"Is not this the fast that I have chosen? to loose the bands of wickedness, to undo the heavy burdens, and to let the oppressed go free, and that ye break every yoke?" — Isaiah 58:6 (KJV)
God's chosen fast reaches beyond the table. It softens us toward justice and mercy — loosing burdens, freeing the oppressed. Real fasting humbles the heart in a way that overflows into how we treat others.
"But as for me, when they were sick, my clothing was sackcloth: I humbled my soul with fasting; and my prayer returned into mine own bosom." — Psalm 35:13 (KJV)
David ties fasting to prayer and humility — "I humbled my soul with fasting." Fasting is a way of lowering ourselves before God, letting go of our self-sufficiency so that we lean wholly on Him.
Did Jesus fast?
Before He began His ministry, Jesus fasted in the wilderness. He knew hunger, and He met temptation there, trusting the Father rather than His own comfort.
"And when he had fasted forty days and forty nights, he was afterward an hungred." — Matthew 4:2 (KJV)
Jesus really hungered; the fast was no small thing. Yet it prepared Him to face temptation with Scripture and dependence on God. His example dignifies fasting as a way of seeking the Father's strength.
"Being forty days tempted of the devil. And in those days he did eat nothing: and when they were ended, he afterward hungered." — Luke 4:2 (KJV)
Luke underlines that "he did eat nothing" through those days. Jesus embraced weakness of body to stand firm in spirit — a pattern for us when we set aside food to seek God more intently.
How did the early church fast?
The first Christians fasted at pivotal moments — seeking God's direction and pleading before big decisions, joining fasting to prayer.
"As they ministered to the Lord, and fasted, the Holy Ghost said, Separate me Barnabas and Saul for the work whereunto I have called them. And when they had fasted and prayed, and laid their hands on them, they sent them away." — Acts 13:2-3 (KJV)
The church fasted while seeking God, and in that place of attentiveness they heard His direction. Fasting and prayer went together as they made one of the most important decisions in their history.
"So we fasted and besought our God for this: and he was intreated of us." — Ezra 8:23 (KJV)
Ezra and the people fasted to seek God's protection, and He answered — "he was intreated of us." Fasting is a way of casting ourselves on God's mercy and trusting Him to hear.
Frequently asked questions
What does the Bible say fasting is for?
Fasting in the Bible is a way of humbling yourself before God and seeking Him with focused attention. In Joel 2:12 (KJV) God calls His people to turn ye even to me with all your heart, and with fasting, and with weeping, and with mourning. Isaiah 58:6 shows that God also links true fasting to justice and mercy toward others. Fasting is not about impressing God with hunger; it is about turning the whole heart toward Him.
Did Jesus fast?
Yes. Before beginning His public ministry, Jesus fasted in the wilderness. Matthew 4:2 (KJV) says, And when he had fasted forty days and forty nights, he was afterward an hungred. Luke 4:2 records that in those days he did eat nothing. Jesus fasted as He faced temptation and prepared to do the Father's will, giving His followers an example of seeking God through fasting.
"Is not this the fast that I have chosen? to loose the bands of wickedness, to undo the heavy burdens, and to let the oppressed go free, and that ye break every yoke?" — Isaiah 58:6 (KJV)
Take it deeper
These verses are a beginning, not the whole of what God says about fasting. FlickerFaith is a Scripture-first study companion — open it to read these passages in full context, search related verses, and pray through the practice as you seek God. It keeps you close to the Word, not away from it.
Keep reading
Fasting is often joined to prayer, worship, and thanksgiving. To seek God's leading as the early church did, read what the Bible says about the Holy Spirit. Browse every study on Bible topics, explore AI Bible study, or return home.