Isaiah 58 – 66
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, and that ye break every yoke? Isaiah 58:6
Introduction
Imagine going without food, bowing your head in sackcloth, and performing all the outward rituals of piety, only to feel as though your prayers are bouncing off the ceiling. This was the exact crisis facing ancient Israel in Isaiah 58, when the people perplexedly asked God, “Why have we fasted, and You have not seen?”.
God’s response through the prophet Isaiah was a sharp exposure of religious hypocrisy: the issue was not an empty stomach, but a heart detached from righteousness and mercy. While going through the motions of fasting, the people were still finding selfish pleasure, oppressing their workers, and engaging in strife and contention.
Through Isaiah, God completely redefines what a true fast looks like—transforming it from a passive ritual of self-denial into an active, outward demonstration of justice and love. God’s chosen fast demands that His people “loose the bands of wickedness,” by undoing heavy burdens, setting the oppressed free, sharing their bread with the hungry, sheltering the homeless, and covering the naked. When spiritual discipline is paired with genuine social compassion and personal integrity, God promises that our light will break forth like the dawn, our healing will spring up speedily, and He will answer our cries with a reassuring “Here I am”.
BYU professor, Donald W. Parry, describes Isaiah 58 as “the greatest biblical discourse on the law of the fast”. We will explore the timeless message of Isaiah 58, examining why empty religious rituals fail, what it means to practice God’s chosen fast in our daily lives, and how living out this law brings profound spiritual renewal and community restoration.
Context
The confusion about fasting in Isaiah’s time may have stemmed from a deep misunderstanding and misapplication of the original Hebrew terms for fasting:
1. Self-Constraint vs. Oppressing Others (Tzum)
- The Root Meaning: The primary Hebrew word for fast, tzum (צוּם) comes from a root meaning “to press, tie up, or constrain” (and literally means “to cover the mouth”).
- The Misapplication: Biblical fasting was designed as a practice of self-constraint (nefesh ‘ina, or “afflicting/constraining one’s own soul”) to subdue physical appetites and cultivate repentance. The people confused the direction of this constraint: instead of restraining themselves, they used their authority to press, constrain, and oppress others—forcing their laborers to work on fast days, exacting debts, and engaging in strife while making an outward show of piety.
2. The Ambiguity of ‘Iniynu (Affliction vs. Busyness)
- Double Meaning: In Isaiah 58:3, the people ask God, “Why have we afflicted our soul (‘iniynu). In Hebrew, ‘iniynu is ambiguous: it is the standard idiom for self-affliction through fasting, but it also carries the sense of “busied ourselves”.
- The Misapplication: The Israelites confused vain, busy religious activity with genuine repentance. They believed that because they were actively “busying” themselves with elaborate ritual displays—such as drooping their heads like bulrushes and sitting in sackcloth and ashes—they were pleasing God, missing the fact that their hearts and everyday conduct remained unrepentant.
3. Fasting as a Transaction Rather Than Transformation
- The Misapplication: Because the people understood fasting purely as physical self-punishment or “afflicting the soul,” they mistakenly viewed it as a transactional formula—a work that obligated God to respond and grant them favor or rain. When God remained silent, they were confused and defensive. They failed to understand that biblical fasting is not a device to manipulate God, but a physical reflection of an inner desire to break yokes of injustice, care for the poor, and realign one’s life with God’s righteousness.
This is where Isaiah steps in:
The Mirage of Piety — Exposing Empty Worship (Isaiah 58:1–5)
The Unanswered Cry for Notice
The chapter opens with a direct divine command instructing the prophet Isaiah to “cry aloud” with full strength and lift up his voice like a trumpet—or shofar—to declare to the house of Jacob their transgressions and sins. Ancient Israel was experiencing a deep spiritual crisis because God seemed completely silent, leaving them in a dark state where their prayers went unanswered. Perplexed by God’s apparent indifference, the people voiced a frustrated complaint, asking why they had fasted and humbled their souls without God seeing or taking notice.
On the surface, their devotion appeared exemplary; they sought God daily, expressed a delight in knowing His ways, and approached Him as if they were a righteous nation that had not forsaken His ordinances. However, God exposed that while the people viewed themselves as innocent victims waiting for divine justice, they were actually the victimizers who used religious performance as a cover for social and economic sins.
Ritual vs. Reality: Exploitation and Strife
On the very days set aside for fasting, the people continued to pursue their own selfish pleasures, conduct business, and exact oppressive labor from their workers. Rather than cultivating humility or peace, their fasting actually fueled ill tempers, arguments, and social division, causing them to fast for “strife and debate, and to smite with the fist of wickedness”. God made it clear that such contentious and self-serving fasting would never cause their voices to be heard on high.
Superficial Humility: Bowing Like a Bulrush
To display their sorrow, the Israelites engaged in dramatic physical gestures, drooping their heads like hollow bulrush reeds and spreading beds of sackcloth and ashes. Yet, God rejected this hollow outward performance, asking whether a mere day of physical self-affliction and somber posturing could truly be called an acceptable fast to the Lord. Fasting that is detached from moral integrity, repentance, and neighborly love is not true spiritual worship, but merely going hungry.
God’s Chosen Fast — Active Justice and Practical Mercy (Isaiah 58:6–7)
Breaking the Yoke of Oppression
In contrast to empty ritualism, God defines the fast He has chosen as an active, outward demonstration of righteousness and liberation. True fasting requires breaking the chains of wickedness, untying the heavy burdens of oppression, letting the captives go free, and breaking every yoke. These divine commands demand that God’s people cease exploiting others, remove unjust burdens, and actively engage in social and economic reform.
Tangible Acts of Compassion
Beyond stopping evil deeds, a true fast mandates four concrete, practical acts of mercy: sharing bread with the hungry, bringing the homeless poor into one’s house, clothing the naked, and caring for one’s own family.Showing this kind of active compassion involves sharing personal resources, welcoming others into private homes, and sacrificing personal comfort to meet others’ .
The Spiritual Dimension of Service
From a spiritual perspective, sharing bread represents offering the Word of God to those in spiritual hunger, while clothing the naked symbolizes helping sinners receive the garment of Christ’s salvation and righteousness. Ultimately, when fasting is coupled with sincere prayer and generous offerings for the poor, it transforms the soul, aligns human priorities with God’s will, and serves as a vital expression of true discipleship.
Radiance, Healing, and Answered Prayer (Isaiah 58:8–12)
Illumination, Healing, and Protection
God promises powerful blessings of divine favor and restoration when fasting merges with genuine justice and mercy. God pledges that “then shall thy light break forth as the morning,” dispelling spiritual obscurity so that gloom becomes like the noonday sun. Personal and spiritual health will spring forth speedily; righteousness will go before the people, and the glory of the Lord will serve as their rear guard, providing divine protection just as He did during the Exodus.
Restored Communion with God
In addition, true worship restores intimate communion with God, ensuring that when the people call out in prayer, the Lord will immediately respond with a comforting, “Here I am”. God removes the burdensome yoke, the spiteful finger-pointing, and evil talk to answer His people’s prayers.
Community Restoration and Renewed Life
For those who pour out their souls for the afflicted, the Lord promises continuous guidance and soul satisfaction even in drought or sun-scorched places. The righteous individual will become like a well-watered garden and an unfailing spring of water, overflowing with spiritual life. On a community level, this spiritual renewal leads to public restoration, empowering God’s people to rebuild ancient ruins, raise up long-standing foundations, and earn the title “Repairer of the Breach” and “Restorer of Paths to Dwell In”.
From Ritual to Discipleship — The Sabbath Connection & Daily Living (Isaiah 58:13–14)
The Sabbath Connection
In the final verses of the chapter, God connects the law of the fast directly to the sacred observance of the Sabbath. God commands His people to “turn away thy foot from the Sabbath” by refraining from trampling His holy day with self-serving pursuits, commercial business, or idle talk. Instead of viewing God’s set-apart time as a restrictive burden, believers are invited to call the Sabbath a “delight” and honor it as holy to the Lord.
Personally, I have felt an increase of inspiration and revelation as I have sought to live this law with greater sincerity. Fasting, when observed with joy and joined with prayer and generosity, brings sweeter communion with the Lord and a deeper, more personal connection with Him.
Elder Ulisses Soares
Divine Joy and Exaltation
For those who honor God’s day rather than seeking their own ways, God promises that they will find rich spiritual joy in the Lord Himself, ride upon the high places of the earth, and feast on the heritage of Jacob. Both fasting and Sabbath-keeping test whether a person’s faith is merely a self-ruled performance or a sincere covenantal devotion.
A Continuous Way of Life
The modern word for fast “abstain from food,” comes from the Old English fæstan “to make firm; establish, confirm, pledge”. It’s interesting that the Day of Atonement was the only festival that they celebrated by fasting. All the rest were feasts. Perhaps, there is a special bond between the blessings of fasting and the Savior’s atonement. Ultimately, Isaiah 58 teaches that the law of the fast is not an isolated 24-hour ritual, but an ongoing way of life which fastens or secures blessings. True fasting is marked by unselfishness, active charity, and Christlike discipleship.
