Every true and honest Bible student readily confesses that the Bible identifies the Jewish people as the people of God. Unfortunately, the Jews repeatedly provoked the Lord to jealousy. In judgment for their indiscretions, the Lord promised to move the Jewish people to jealousy as He showed His favour unto a people “which are not a people.” According to the apostle Paul, this was fulfilled when the Lord turned to the Gentiles offering them salvation through His Son, the Lord Jesus Christ (Romans 10:19; Romans 11:11). This jealousy was not to be permanent. One day the Lord will again turn back to the Jewish people after the Rapture of the church.
The Bible consistently identifies the Lord as a jealous God. As the Creator, He deserves man’s undivided allegiance. As the most High God, He is worthy of man’s unadulterated worship. It is often in this vein that the Bible speaks of God’s jealousy. He warned Israel not to make or bow down to any graven images (Exodus 20:4-5; Deuteronomy 5:8-9; Psalm 78:58) because He was a jealous God and would have no choice but to judge such infidelity. The same was true of any false god (Deuteronomy 32:16) or sin (1 Kings 14:22) which man allowed to come between him and his Creator. God is perfectly just in His jealousy since man was created for God’s pleasure (Revelation 4:11).
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.
Modern Christianity has been redefining Bible terminology and fasting is no exception. Perhaps this is because Christians want to look spiritual without the necessary dedication. Some claim to be fasting from certain things like caffeine or sugar intake. The Bible does not offer anyone this type of latitude. True biblical fasting involves much more than refraining from some handpicked pleasure. According to our passage, Paul entreated the people to take meat because they had been fasting for two weeks. Esther 4:16 reveals that fasting consists of taking no food or drink. Although some Bible teachers have suggested that fasting means to simply refrain from earthly joys, fasting in the Bible always includes refraining from food or from both food and drink. Even the results of fasting identify that it is associated with depriving the body of food. In Psalm 109:24, David said, “My knees are weak through fasting; and my flesh faileth of fatness.” Foregoing earthly pleasures is a byproduct of fasting, not the sole object.