A PROMISE OF SALVATION TO THE HUMBLE AND PENITENT, WITH A FURTHER THREAT AGAINST THE WICKED. The prophet, in this portion of his discourse, whereof "comfort" is the key-note (Isaiah 40:1), can never continue threatening long without relapsing into a tone of tenderness and pity.
He now sets against his long denunciation (in Isaiah 57:3-12) an ample promise (Isaiah 57:15-19), and against his brief encouragement (in Isaiah 57:13, Isaiah 57:14) a short menace (Isaiah 57:20, Isaiah 57:21).