What does Isaiah's vision teach us about God?

Isaiah's vision in Isaiah 6 reveals God's immense holiness and sovereignty, asserting that no one can approach Him apart from proper worship. When Isaiah sees the Lord high and lifted up, he recognizes his own sinfulness and unworthiness. In Isaiah 6:5, he proclaims, 'Woe is me! for I am undone; because I am a man of unclean lips.' This acknowledgment of sin points to the need for a mediator, which is fulfilled in Jesus Christ. His holiness states the necessity for Christ's atonement to bridge the gap between sinful humanity and a holy God.