One of the things the Lord asks prophets to do is to warn about the consequences of sin. In the case of Old Testament prophets, this often meant telling the powerful rulers of mighty kingdoms that they must repent or be destroyed. It was a dangerous task, but Isaiah was fearless, and his warnings to the kingdoms of his day—including Israel, Judah, and surrounding nations—were bold (see Isaiah 13–23).
However, Isaiah also had a message of hope. Even though the prophesied destructions eventually did come upon these kingdoms, Isaiah foresaw a chance for restoration and renewal. The Lord would invite His people to return to Him. He would make “the parched ground … become a pool, and the thirsty land springs of water” (Isaiah 35:7). He would perform “a marvellous work and a wonder” (Isaiah 29:14), restoring to Israel the blessings He had promised them. Neither Isaiah nor anyone else alive at that time lived to see this marvelous work. But we are seeing its ultimate fulfillment today. In fact, we are part of it!