Why was the Book of Isaiah included in the Old Testament? What is the significance of the Book of Is
Isaiah 1:1 identifies the author of the book of Isaiah as the Prophet Isaiah.
The book of Isaiah was written between 739 and 681 B.C. As is the case with all biblical writings, the date determines its placement in the Old or New Testament.
The Prophet Isaiah was primarily called to prophesy to the Kingdom of Judah. Judah was going through times of revival and times of rebellion. Judah was threatened with destruction by Assyria and Egypt, but was spared because of God’s mercy. Isaiah proclaimed a message of repentance from sin and hopeful expectation of God’s deliverance in the future.
The book of Isaiah reveals God’s judgment and salvation. God is “holy, holy, holy” (Isaiah 6:3), and therefore He cannot allow sin to go unpunished (Isaiah 1:2; 2:11-20; 5:30; 34:1-2; 42:25). Isaiah portrays God’s oncoming judgment as a “consuming fire” (Isaiah 1:31; 30:33).
At the same time, Isaiah understands that God is a God of mercy, grace, and compassion (Isaiah 5:25; 11:16; 14:1-2; 32:2; 40:3; 41:14-16). The nation of Israel (both Judah and Israel) is blind and deaf to God’s commands (Isaiah 6:9-10; 42:7). Judah is compared to a vineyard that should be, and will be, trampled on (Isaiah 5:1-7). Only because of His mercy and His promises to Israel, will God not allow Israel or Judah to be completely destroyed. He will bring restoration, forgiveness, and healing (43:2; 43:16-19; 52:10-12).
More than any other book in the Old Testament, Isaiah focuses on the salvation that will come through the Messiah. The Messiah will one day rule in justice and righteousness (Isaiah 9:7; 32:1). The reign of the Messiah will bring peace and safety to Israel (Isaiah 11:6-9). Through the Messiah, Israel will be a light to all the nations (Isaiah 42:6; 55:4-5). The Messiah’s kingdom on earth (Isaiah chapters 65-66) is the goal toward which all of the book of Isaiah points. It is during the reign of the Messiah that God’s righteousness will be fully revealed to the world.
In a seeming paradox, the book of Isaiah also presents the Messiah as one who will suffer. Isaiah chapter 53 vividly describes the Messiah suffering for sin. It is through His wounds that healing is achieved. It is through His suffering that our iniquities are taken away. This apparent contradiction is solved in the Person of Jesus the Christ. In His first advent, Jesus was the suffering servant of Isaiah chapter 53. In His second advent, Jesus will be the conquering and ruling King, the Prince of Peace (Isaiah 9:6).
Isaiah Chapter 53 describes the coming Messiah and the suffering He would endure in order to pay for mans sins. In His sovereignty, God orchestrated every detail of the crucifixion to fulfill every prophecy of this chapter, as well as all other messianic prophecies of the Old Testament. The imagery of chapter 53 is poignant and prophetic and contains a complete picture of the Gospel. Jesus was despised and rejected (v. 3; Luke 13:34; John 1:10-11), stricken by God (v.4; Matthew 27:46), and pierced for our transgressions (v. 5; John 19:34; 1 Peter 2:24). By His suffering, He paid the punishment man deserved and became for us the ultimate and perfect sacrifice (v. 5; Hebrews 10:10). Although He was sinless, God laid on Him mans sin, and those who accept Christ, became God’s righteousness in Him (2 Corinthians 5:21).
The book of Isaiah presents Christ in undeniable detail. He is the only way to heaven, the only means of obtaining the grace of God, the only Way, the only Truth, and the only Life (John 14:6; Acts 4:12). Ultimately, there is no second chance after death, and for those who do not believe, you better be right, eternity in hell is a very long time.
Those who claim to be believers in Christ and are two-faced, are hypocrites, that is perhaps the best summary of how Isaiah viewed the nation of Israel. Israel had an appearance of righteousness, but it was a facade. In the Book of Isaiah, the Prophet Isaiah challenges Israel to obey God with all of their heart, not just on the outside. Isaiah’s desire was that those who heard and read his words would be convicted to turn from wickedness and turn to God for forgiveness and healing.