581 “Cry aloud, don’t spare, lift up your voice like a trumpet, and declare to my people their disobedience, and to the house of Jacob their sins. 2 Yet they seek me daily, and delight to know my ways: as a nation that did righteousness, and didn’t forsake the ordinance of their God, they ask of me righteous judgments; they delight to draw near to God.
3 ‘Why have we fasted,’ say they, ‘and you don’t see? why have we afflicted our soul, and you take no knowledge?’
“Behold, in the day of your fast you find pleasure, and exact all your labors. 4 Behold, you fast for strife and contention, and to strike with the fist of wickedness: you don’t fast this day so as to make your voice to be heard on high. 5 Is such the fast that I have chosen? the day for a man to afflict his soul? Is it to bow down his head as a rush, and to spread sackcloth and ashes under him? Will you call this a fast, and an acceptable day to Yahweh?
Matthew Henry's Commentary on Isaiah 58:1-5
Commentary on Isaiah 58:1-2
(Read Isaiah 58:1-2)
The Holy Spirit had hypocrites of every age in view. Self-love and timid Christians may say, Spare thyself; dislike to the cross and other motives will say, "Spare the rich and powerful;" but God says, "Spare not:" and we must obey God, not men. We all need earnestly to pray for God's assistance in examining ourselves. Men may go far toward heaven, yet come short; and they may go to hell with a good reputation.
Commentary on Isaiah 58:3-12
(Read Isaiah 58:3-12)
A fast is a day to afflict the soul; if it does not express true sorrow for sin, and does not promote the putting away of sin, it is not a fast. These professors had shown sorrow on stated or occasioned fasts. But they indulged pride, covetousness, and malignant passions. To be liberal and merciful is more acceptable to God than mere fasting, which, without them, is vain and hypocritical. Many who seem humble in God's house, are hard at home, and harass their families. But no man's faith justifies, which does not work by love. Yet persons, families, neighbourhoods, churches, or nations, show repentance and sorrow for sin, by keeping a fast sincerely, and, from right motives, repenting, and doing good works. The heavy yoke of sin and oppression must be removed. As sin and sorrow dry the bones and weaken the strongest human constitution; so the duties of kindness and charity strengthen and refresh both body and mind. Those who do justly and love mercy, shall have the comfort, even in this world. Good works will bring the blessing of God, provided they are done from love to God and man, and wrought in the soul by the Holy Spirit.