Many Christians are unfamiliar with spiritual fasting. Some believe that fasting is an Old Testament tradition neither required nor relevant to the New Testament grace under which we now live. In truth, however, fasting is a necessary though underutilized spiritual discipline that Jesus addressed right along with giving and prayer (reference Matthew 6). Fasting was never replaced, rescinded, or superseded in the New Testament, and it is not just Old Testament legalism. Jesus came to fulfill the Old Testament, not to render it irrelevant. As Randy Alcorn so eloquently stated in Money, Possessions & Eternity, "Being under grace does not mean living by lower standards than the law." In fact, Jesus assumed that we believers would fast. Jesus said, "When you fast" (Matthew 6:16) not "if you fast".

The verses below emphasize that we are saved by grace, not by works. Fasting, like prayer, is a spiritual tool that believers should use not to earn righteousness but to embrace it.

"I do not set aside the grace of God, for if righteousness could be gained through the law, Christ died for nothing." (Galatians 2:21)

"For the kingdom of God is not a matter of eating and drinking, but of righteousness, peace, and joy in the Holy Spirit, because anyone who serves Christ in this way is pleasing to God and approved by men." (Romans 14:17-18)

"But food does not bring us near to God; we are no worse if we do not eat, and no better if we do." (1 Corinthians 8:8)

Fasting is a sacred and special sacrifice; it is for the Lord, not for human approval or notice. In Matthew 6:16-18, Jesus cautions those who choose to fast for human admiration and approval, "When you fast, do not look somber as the hypocrites do, for they disfigure their faces to show men they are fasting. I tell you the truth, they have received their reward in full. But when you fast, put oil on your head and wash your face, so that it will not be obvious to men that you are fasting, but only to your Father, who is unseen; and your Father, Who sees what is done in secret, will reward you."

Please understand the spirit of Jesus' message. He is not saying that absolutely no one should know when we are fasting. In fact, it is very important to have a trusted Christian friend or a network of Christian friends who can pray for you while you are fasting. Jesus is cautioning against fasting for the approval and notice of man, just as He cautions against giving for sheer spectacle.

Below, in chronological order, is a representation of those who fasted in the Bible, but it is not a complete or exhaustive list.

Moses

(Exodus 34:28), in a 40-day radical fast (no food or water), sustained by the Lord as he received the 10 commandments

The Israelites

(Judges 20:26-27), in a corporate fast, to seek the Lord's guidance

(Nehemiah 9:1), in a corporate fast, confessing their sins and worshiping the Lord

(1 Samuel 7:6), led by Samuel in a corporate and intercessory fast, repenting for their sins

King David

(2 Samuel 12:16), in intercession for his ill son

(Psalm 35:13) in mourning and intercession for the illness of others

(Psalm 69:10) in humble repentance, asking God for personal mercy and restoration

Elijah

(1 Kings 19:8) in a 40-day radical fast, prompted and sustained by the Lord

Ezra

(Ezra 8:21-23), in humble petition before the Lord

Esther

(Esther 4:16), in a three-day fast, accompanied by fasting intercessors, as she sought the Lord's favor in interceding for the Jews

The Ninevites and the King of Nineveh

(Jonah 3:5-10), in a corporate fast, earnestly repenting of their evil ways

Jesus

(Matthew 4:2, Luke 4:2), in preparation for His earthly ministry

New Testament Leaders and Prophets

(Acts 13:1-3), in worship of the Lord before He instructed them to set apart Barnabus and Saul for His designated missionary appointment

Paul and Barnabus

(Acts 14:23), in committing the appointed church elders to the Lord

Some wonder, "How do I fast while continuing to work, take care of my family, and just live life in general?" When you put the Lord first, He supernaturally and divinely orders your day so that you are able to accomplish the important things according to His will. The urgent no longer overshadows the important, and things that seemed pressing suddenly fall away, no longer significant in His great kingdom plan. This means that the Lord will give you the grace, energy, and sustenance to care for your essential responsibilities while you are fasting. Necessary work and caring for your family fits the category of "essential responsibilities". The key is to prioritize the Lord above all else, to seek His guidance in all things, and to trust Him every step of the way. You must also have the courage and obedience to forsake opportunities and tasks on your list if God's priorities prove different from yours.

"For My thoughts are not your thoughts, neither are your ways My ways," declares the LORD. "As the heavens are higher than the earth, so are My ways higher than your ways and My thoughts than your thoughts." (Isaiah 55:8-9)

In the account of Jesus' desert temptation, both Matthew and Luke record that, at the end of His 40-day fast, "He was hungry". Jesus, fully man and fully God, experienced every emotion and sensation as His children do: hunger, weakness, tiredness. The significant difference, of course, is that even in His weakened state, Jesus perfectly avoided temptation and sin. He did so by completely relying on the Word of God. Jesus knows that you will feel weak, hungry, sick, and even afraid at times, but He will sustain you in ways you never thought possible. To receive that sustenance, you must persevere in trust and faithfulness.

"Jesus answered, 'It is written: Man does not live on bread alone, but on every word that comes from the mouth of God.' " (Matthew 4:4)

The Great Commandment, as Jesus replied to the Pharisees in Matthew 22:37-38 is to "Love the Lord your God with all your heart and with all your soul and with all your mind. This is the first and greatest commandment. And the second is like it: Love your neighbor as yourself."

Fasting, as outlined in Isaiah 58, accomplishes both the first and second greatest commandments and also highlights the "true" fast (indicated by actions representative of Christ's character) as opposed to the "legalistic" fast (indicated by actions representative of arrogant, sinful, and unrepentant human hearts).