6 Is not this the holy day for which I have given orders: to let loose those who have wrongly been made prisoners, to undo the bands of the yoke, and to let the crushed go free, and every yoke be broken? 7 Is it not to give your bread to those in need, and to let the poor who have no resting-place come into your house? to put a robe on the unclothed one when you see him, and not to keep your eyes shut for fear of seeing his flesh?
8 Then will light be shining on you like the morning, and your wounds will quickly be well: and your righteousness will go before you, and the glory of the Lord will come after you. 9 Then at the sound of your voice, the Lord will give an answer; at your cry he will say, Here am I. If you take away from among you the yoke, the putting out of the finger of shame, and the evil word; 10 And if you give your bread to those in need of it, so that the troubled one may have his desire; then you will have light in the dark, and your night will be as the full light of the sun: 11 And the Lord will be your guide at all times; in dry places he will give you water in full measure, and will make strong your bones; and you will be like a watered garden, and like an ever-flowing spring. 12 And your sons will be building again the old waste places: you will make strong the bases of old generations: and you will be named, He who puts up the broken walls, and, He who makes ready the ways for use.
Matthew Henry's Commentary on Isaiah 58:6-12
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.