III. Israel's crisis of faith chs. 7--39

This long section of the book deals with Israel's major decision in Isaiah's day. Would she trust in Yahweh or in other nations? The decision was a matter of faith; who is more trustworthy, God or strong people? God promised that trust in the nations would result in destruction (ch. 34) but trust in Him would bring abundance (ch. 35). Israel's decision would also determine whether she had a message for the nations or not and whether she would fulfill her mission to the nations or not. This decision is, of course, one that the people of God of all ages continually face.

 A. The choice between trusting God or Assyria chs. 7-12

This section of Isaiah provides a historical introduction to the theological problem described above. King Ahaz had to make this decision of faith because he faced the threat of military invasion. Though warned by the prophet, the king made the wrong decision and experienced the bitter consequences. All four subdivisions of this section focus on Assyria and deal with the implications of trust in her rather than God. As Isaiah had faced his moment of decision (ch. 6), so King Ahaz did now. But with the bad news of Ahaz's apostasy comes the assurance that God would raise up a faithful Anointed One in the future.

 B. God's sovereignty over the nations chs. 13-35

This major section of the book emphasizes the folly of trusting in the nations rather than in Yahweh. The section preceding it shows how King Ahaz trusted in Assyria and experienced destruction (chs. 7-12). The section following it shows how King Hezekiah trusted in the Lord and experienced deliverance (chs. 36-39). In this section the prophet expanded his perspective from Israel to include the world. The God of Israel is also Lord of the nations.

 C. The tests of Israel's trust chs. 36-39

Chapters 36-39 conclude the section of the book dealing with the issue of trust by giving historical proof that Yahweh will protect those who trust in Him. In these chapters, King Hezekiah represents the people of Judah.³⁴⁴These lessons from history should encourage God's people to trust in Him rather than in the arm of flesh. Chapters 40-66 contain oracles in which Babylonian captivity looms large. So the present section (chs. 36-39) forms a bridge from emphasis on Assyria (chs. 1-35) to emphasis on Babylonia (chs 40-66). They are also almost identical to 2 Kings 18-20 (cf. 2 Chron. 29-32), except for the inclusion of Isaiah's poem in Isaiah 38:9-20.³⁴⁵These chapters consist of more narrative material and fewer oracles than the sections that precede and follow it, in which the opposite is true.

This section contains two parts. The first one (chs. 36-37) involved King Hezekiah's trust in God and deliverance when Sennacherib's Assyrian army besieged Jerusalem. The second (chs. 38-39) involved Hezekiah's failure to trust God and his consequent judgment by God when the Babylonian envoys peacefully visited Jerusalem. In chapters 36-37 we see Judah's deliverance accomplished, and in chapters 38-39 we hear Judah's captivity announced. Thus the real hinge of the book occurs between chapters 37 and 38, where emphasis on Assyria ends and emphasis on Babylonia begins.