11 Those whom the Lord has made free will come back with songs to Zion; and on their heads will be eternal joy: delight and joy will be theirs, and sorrow and sounds of grief will be gone for ever. 12 I, even I, am your comforter: are you so poor in heart as to be in fear of man who will come to an end, and of the son of man who will be like grass?
Matthew Henry's Commentary on Isaiah 51:11-12
Commentary on Isaiah 51:9-16
(Read Isaiah 51:9-16)
The people whom Christ has redeemed with his blood, as well as by his power, will obtain joyful deliverance from every enemy. He that designs such joy for us at last, will he not work such deliverance in the mean time, as our cases require? In this world of changes, it is a short step from joy to sorrow, but in that world, sorrow shall never come in view. They prayed for the display of God's power; he answers them with consolations of his grace. Did we dread to sin against God, we should not fear the frowns of men. Happy is the man that fears God always. And Christ's church shall enjoy security by the power and providence of the Almighty.