The Bible commends fasting as a spiritual discipline — abstaining from food to focus on God in prayer, repentance, and seeking direction. Jesus assumed his followers would fast (Matthew 6:16-18). It is not about earning anything from God but creating space for him.
Fasting is a recurring biblical practice. Several types: (1) Normal fast — abstaining from food but not water (Jesus's 40-day fast). (2) Absolute fast — abstaining from both food and water briefly (Esther 4:16). (3) Partial fast — limiting certain foods (Daniel 1:8-16). Biblical purposes: seeking God's direction (Ezra 8:21-23, Acts 13:2-3), repentance (Day of Atonement, Joel 2:12, Jonah 3), mourning (2 Samuel 12:16), spiritual battle (Mark 9:29), intercession (Esther 4:16). Jesus's teaching (Matthew 6:16-18) assumes followers will fast. He does not say 'if ye fast' but 'when ye fast.' Concern: not whether but how. Isaiah 58 — the most extensive biblical critique of fasting — denounces fasting that does not produce justice and mercy. Religious fasting that does not change how one treats others is rejected. Practical principles: fasting is for God, not display; accompanies prayer; for those healthy enough; the discomfort is the point — it reminds the body who is in charge.
“When ye fast, be not, as the hypocrites, of a sad countenance... thou, when thou fastest, anoint thine head, and wash thy face.”
“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.”
“Turn ye even to me with all your heart, and with fasting, and with weeping, and with mourning.”
“As they ministered to the Lord, and fasted, the Holy Ghost said, Separate me Barnabas and Saul.”
“And when he had fasted forty days and forty nights, he was afterward an hungred.”
Identify the purpose. Start small (a meal, a day). Pair with prayer. Maintain medical caution. Hide it from people (Matthew 6:18). Break the fast wisely.
Not as a continuous obligation, but Jesus said 'When ye fast' (Matthew 6:16), not 'if.' The OT required fasting on the Day of Atonement (Leviticus 16:29). Otherwise, fasting is a free discipline chosen for specific purposes.
Biblical fasts range from one meal to 40 days. Start small. A single meal or single day is a meaningful first fast. Extended fasts require medical consideration.
Drink water (in most fasts). Pray. Read Scripture. Live your normal life. Use the meal times for spiritual focus. Avoid drawing attention to your fasting (Matthew 6:18).
Traditional biblical fasting is about food. Christians have also fasted from other things — social media, entertainment. But food fasting remains the most biblical pattern and the most physically meaningful.