Isaiah 49:9 - Matthew Poole's English Annotations on the Holy Bible

That thou mayest say, to wit, with power and effect, as when God said, Let there be light, &c. To the prisoners; to the Gentiles, who are fast bound by the cords of their sins, and taken captive by the devil at his will, as this same phrase is understood, Isaiah 42:7. Go forth; come forth to the light, receive Divine illumination and consolation. They shall feed in the ways, and their pastures shall be in all high places; they shall have abundant provision in all places, yea, even in those which commonly are barren and unfruitful, and such are both common roads and high grounds.