IV. Israel's calling in the world chs. 40--55

This part of Isaiah picks up a theme from chapters 1-39 and develops it further. That theme is God's faithfulness to His promises to give His people a glorious future after He disciplined them for their unfaithfulness. The Lord did not have to make these promises, but He did so in grace. Israel would have a glorious future, not because of but in spite of herself.

 A. God's grace to Israel chs. 40-48

These chapters particularly address the questions of whether God could deliver and whether He wanted to deliver the Israelites that the coming exile raised in the minds of Isaiah's contemporaries.

"We emerge in 40:1 in a different world from Hezekiah's, immersed in the situation foretold in 39:5-8, which he was so thankful to escape. Nothing is said of the intervening century and a half; we wake, so to speak, on the far side of the disaster, impatient for the end of captivity. In chs. 40-48 liberation is in the air; there is the persistent promise of a new exodus, with God at its head; there is the approach of a conqueror, eventually disclosed as Cyrus, to break Babylon open; there is also a new theme unfolding, to reveal the glory of the call to be a servant and a light to the nations."³⁸⁸

Isaiah's audience was not in Babylonian captivity when he wrote these chapters. He was prophesying about the people of God in that captivity. Chapters 40-66 presuppose the Exile.

"In these chapters the prophet reminded the people of their coming deliverance because of the Lord's greatness and their unique relationship with Him. He is majestic (chap. 40), and He protects Israel and not the world's pagan nations (chap. 41). Though Israel had been unworthy (chap. 42) the Lord had promised to regather her (43:1-44:5). Because He, the only God (44:6-45:25), was superior to Babylon He would make Babylon fall (chaps. 46-47). Therefore Isaiah exhorted the Israelites to live righteously and to flee away from Babylon (chap. 48)."³⁸⁹

 B. God's atonement for Israel chs. 49-55

In the previous section (chs. 40-48), Isaiah revealed that God would redeem His servant Israel from Babylonian captivity by using one of His servants, Cyrus. Israel's sin had resulted in her going into the furnace of Babylon for a period of refinement.

In this section, the prophet revealed that God would also deal with the more serious problem of sin in Israel that had resulted in her captivity. He would do this by using another Servant of His, the Messiah. This Servant would not only take care of Israel's sin problem but that of the whole world. Thus Isaiah passed from dealing mainly with physical deliverance to dealing with spiritual salvation, from Cyrus to Christ.