But the wicked are like the storm-tossed sea, for it cannot be still, and its waves churn up mire and muck.
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
But the wicked are like the troubled sea, when it cannot rest,.... Disturbed by winds, storms, and hurricanes, when its waves rise, rage, and tumble about, and beat against the shore and sand, threatening to pass the bounds fixed for it.
when it cannot rest--rather, "for it can have no rest" (Job 15:20, &c.; Pro 4:16-17). English Version represents the sea as occasionally agitated; but the Hebrew expresses that it can never be at rest.