Isaiah was given the unique opportunity to appear before the Lord in his heavenly throne room. It says in Isaiah 6:1, “In the year that king Uzziah died I saw also the Lord sitting upon a throne, high and lifted up, and his train filled the temple. King Uzziah died in 740 B.C., therefore Isaiah’s appearance occurred more than 700 years before the Lord was born. Isaiah wanted everyone to be aware that the Lord was reigning in heaven before he was born on earth. It is important to note that Isaiah did not have a vision, but actually stood in the Lord’s presence. Isaiah did not refer to God by his personal name, but by his title adonay, which means “Lord” or “Lord over all” (136). “In such contexts God is conceived as a Being who is sovereign ruler and almighty master” (113).
Christ himself assumed the title of Lord during his earthly ministry. “His purpose did not become clear to the disciples until after his resurrection, and the revelation of His Diety consequent thereon” (2962). An interesting aspect of Jesus’ relationship with his disciples is they never referred or spoke to him using his personal name. “The title ‘Lord,’ as given to the Savior, in its full significance rests upon the resurrection, and is realized only in the Holy Spirit” (2962). Given this explanation of the use of the title Lord, it seems clear that Isaiah was in the presence of the Lord Jesus and was commissioned by him to “Go, and tell this people” (Isaiah 6:9) about him.
The message Isaiah was commissioned to preach was the birth of the Messiah. Although there were references to the Messiah before Isaiah’s ministry, no one spoke as openly or plainly about the expected Savior as Isaiah did. A key to understanding the significance of the Messiah is found in Isaiah 6:3 where it says, “The whole earth is full of his glory.” Isaiah’s ministry marked the start of the proclamation of the gospel that still continues today, and will continue, until it reaches every person in the entire world.
In order for Isaiah to fulfill his commission, he had to be equipped to preach the gospel while he was still in an unsaved or unregenerate state. Isaiah proclaimed, “Woe is me! for I am undone: because I am a man of unclean lips, and I dwell in the midst of a people of unclean lips” (Isaiah 6:5). Isaiah received a type of cleansing similar to what is referred to in the New Testament as renewing (Titus 3:5). It says of his sins in Isaiah 6:7, “thine iniquity is taken away and thy sin purged.” Apparently, Isaiah returned to a sinless state, but it probably wasn’t permanent as with salvation or being born again (Romans 11:27).