What is fasting in the Bible?
Fasting is voluntarily going without food for spiritual purposes — to seek God, repent, pray, or grow in dependence on him. It is not a hunger strike to twist God's arm, but a way to say with our bodies that he matters more than bread.
Throughout Scripture, God's people fasted in times of seeking him more intensely — for repentance (Joel 2:12), for guidance (Acts 13:2–3), for breakthrough (Ezra 8:21–23), for grief (2 Samuel 1:12). Fasting in the Bible is almost always abstaining from food (sometimes water), for a defined period, with a spiritual aim.
Jesus himself fasted forty days in the wilderness and clearly expected his disciples to fast — 'when you fast,' he said, not 'if' (Matthew 6:16–18). At the same time, he warned against using fasting as a religious performance to be seen by others. Fasting is meant to be quiet, between you and God.
Why does it help? Going without food makes us feel our creatureliness; the hunger becomes a prompt to pray. We are saying with our bodies what our words have said: God himself is what we most need. Fasting does not earn God's favor, but it clears space for him to do deep work in us.
Original BibleDawn answer · reviewed 2026-06. Drafted with AI assistance and reviewed for accuracy.