Man’s appetite can serve as a powerful motivator. Yet, there are times when the body is so troubled because of difficulties that it will either forget its desire to eat or lose its desire to eat altogether. The psalmist said that his heart was smitten to the point that he forgot to eat his bread (Psalm 102:4). In Psalm 107:18, the Bible speaks of men who abhor “all manner of meat” and that “draw near unto the gates of death.” Other Bible characters serve as appropriate examples. Hannah was so distraught by Peninnah’s mocking over her barrenness that she refused to eat (1 Samuel 1:7). David refused to eat while pleading with the Lord for the life of his child (2 Samuel 12:16-17). At other times, illness may cause a severe reduction in appetite.
Fasting, similar to other actions in life, has specific purposes and appointed times. The Bible offers various reasons why people might fast: an immediate need in prayer (2 Samuel 12:16), a need to loosen the bands of wickedness or undo heavy burdens (Isaiah 58:6), during times of elevated conflict or duty in service (Matthew 17:21; Acts 13:3), as a symbol of mourning (2 Samuel 1:12), and as an outward manifestation of true repentance (Jonah 3:5). This list is not exhaustive, but simply demonstrates that God’s people have many good reasons for fasting. Even if none of these circumstances surfaces in our lives, we should fast because we know that the Lord expects us to do so.
