“There is no peace,” says my God, “for the wicked.”
The body of the people of Israel, in this account of God's dealings with them, is spoken of as a particular person (Isa 57:17, Isa 57:18), but divided into two sorts, differently dealt with - some who were sons of peace, to whom peace is spoken (Isa 57:19), and others who were not, who have nothing to do with peace, Isa 57:20, Isa 57:21. Observe here, I.
Commenting on Isaiah 57:17-21
There is no peace, saith my God, to the wicked. They have no share in the peace made by the blood of Christ; they have no true, solid, inward peace of conscience; nor will they have any part in the happiness and prosperity of the church and people of God in the latter day, which will but add to their uneasiness; and will have no...
(Isa 48:22; Kg2 9:22). my God--The prophet, having God as his God, speaks in the person of Israel, prophetically regarded as having now appropriated God and His "peace" (Isa 11:1-3), warning the impenitent that, while they continue so, they can have no peace. Next: Isaiah Chapter 58