Isaiah 1:19 - Ellicott's Commentary On The Whole Bible

If ye be willing and obedient, ye shall eat the good of the land. — The promise of temporal blessings as the reward of a true repentance, instead of the spiritual peace and joy of Psalms 51:8-12, fills us at first with a sense of disappointment. It has to be remembered, however, that the prophet spoke to those who were unjust and selfish, and who were as yet far from the broken and contrite heart of the true penitent. He was content to wake up in them the dormant sense of righteousness, and to lead them to recognise the moral government of God. In the long run they would not be losers by a change of conduct. The choice of eating or “being eaten” (the “devoured” of Isaiah 1:20), enjoying a blameless prosperity, or falling by the sword, was placed before those to whom the higher aspirations of the soul were little known. Such is, at all times, one at least of the methods of God’s education of mankind.