Isaiah 29:18-19

18, 19. That day The period of moral changes to be wrought by Jehovah, mentioned in the preceding verse. The revolution is to be complete. Hinderances to teaching the law, through blind leaders, shall be removed. The moral blindness of Isaiah 29:11-12, is here put in antithesis to the docility and consequent joy in God and his Gospel among the Gentile converts, and the people, now blind and deaf so far as the word of Jehovah is concerned, shall be changed into a people with open ears and seeing eyes. Words such as those the prophet in vain now holds forth, shall then be heard with willing distinctness, and their truth be clearly discerned.

The poor… rejoice in the Holy One of Israel Poor men, the pious poor who fear God, and had been subjected to oppression.