50:1-3 Those who have professed to be people of God, and seem to be dealt severely with, are apt to complain, as if God had been hard with them. Here is an answer for such murmurings; God never deprived any of their advantages, except for their sins. The Jews were sent into Babylon for their idolatry, a sin which broke the covenant; and they were at last rejected for crucifying the Lord of glory. God called on them to leave their sins, and prevent their own ruin. Last of all, the Son came to his own, but his own received him not. When God calls men to happiness, and they will not answer, they are justly left to be miserable. To silence doubts concerning his power, proofs of it are given. The wonders which attended his sufferings and death, proclaimed that he was the Son of God, Mt 27:54.

3. heavens … blackness—another of the judgments on Egypt to be repeated hereafter on the last enemy of God's people (Ex 10:21).

sackcloth—(Re 6:12).