Isaiah 6:5

Isaiah feared that he would be consumed since he was in the presence of the purest of all beings. He announced woe on himself; he was in deep trouble (cf. Isaiah 5:8; Isaiah 5:11; Isaiah 5:18; Isaiah 5:20-22). These are the first words that Isaiah himself spoke in this book, and they announce a prophetic woe on himself. He first had to become aware of his own sin and uncleanness before he could worship God as he should. Not only did he have unclean lips, but he dwelt among a people whose lips were very unclean and, therefore, unfit to praise or speak for God. King Uzziah died an unclean leper (2 Chronicles 26:16-21). Unclean lips evidence unclean hearts (cf. Matthew 12:34). Whereas God was holy, Isaiah and the Jews were unclean, not upright, impure in their ethical conduct. Isaiah sensed his danger because he saw the real King of Israel who was Yahweh of armies. It is in seeing God for who He is that we can see ourselves for who we are and can, therefore, accurately evaluate our condition (cf. Job 42:5-6; Daniel 10:14-17; Revelation 1:17).