Do you not know? Have you not heard? The LORD is the everlasting God, the Creator of the ends of the earth. He will not grow tired or weary; His understanding is beyond searching out.
28. Hast thou not known? He repeats the same statement which he had formerly made, that the people who had been carefully taught in the school of God were inexcusable for their slothfulness, and chides them sharply for not having profited more by the doctrine of the Law, and by the other means which God had bestowed in addition to that knowledge which they possessed in common with the Gentiles.
These captives shame themselves by their own words. They bear the names Jacob and Israel from one who found God faithful in all straits, yet now they speak as if the Lord ignores their case. It is bad to harbor such thoughts in the mind; it is worse to speak them aloud and make them doctrine.
AI summary
Commenting on Isaiah 40:27-31
He giveth power to the faint,.... Who are ready to faint under afflictions, because they have not immediate deliverance, or their prayers are not answered at once, or promises not fulfilled as they expected; to such he gives fresh supplies of spiritual strength; he strengthens their faith, and enlarges their views, to behold the goodness of the Lord in the land of the living, and...