You will give them dullness of heart; your curse will be on them.
He expresses what the vengeance was to be, even that God would give them up to a reprobate mind; for by מגנת-לב, meganet-leb, he no doubt meant the blindness of the heart, and at the same time included stupidity, as though he had said, “O Lord, so oppress them with evils, that they may become stupified.” For it is an extremity of evil, when we...
We may observe throughout this chapter a struggle in the prophet's breast between sense and faith, fear and hope; he complains and then comforts himself, yet drops his comforts and returns again to his complaints, as Psa 42:1-11. But, as there, so here, faith gets the last word and comes off a conqueror; for in these verses he concludes with some comfort.
Commenting on Lamentations 3:55-66
sorrow--rather, blindness or hardness; literally, "a veil" covering their heart, so that they may rush on to their own ruin (Isa 6:10; Co2 3:14-15).