11 And the ransomed of Jehovah shall return, and come with singing unto Zion; and everlasting joy shall be upon their heads: they shall obtain gladness and joy; [and] sorrow and sighing shall flee away. 12 I, even I, am he that comforteth you: who art thou, that thou art afraid of man that shall die, and of the son of man that shall be made as 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.