Isaiah 6:5 (KJV) reads, "Then said I, 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: for mine eyes have seen the King, the Lord of hosts."

In this verse, the prophet Isaiah is expressing a deep and profound sense of unworthiness and guilt after experiencing a vision of God. The context of this verse is found in the sixth chapter of the Book of Isaiah, where the prophet recounts his commissioning by God. The chapter begins with Isaiah having a vision of the Lord sitting on a throne, high and exalted, with seraphim praising God and declaring His glory. This vision fills the temple with smoke, and Isaiah is overwhelmed by the majesty and holiness of the Lord.

The core theme of this verse is the profound sense of unworthiness and guilt that Isaiah feels in the presence of God. The term "Woe is me" expresses Isaiah's deep anguish and despair at the realization of his own sinfulness. He is undone, or ruined, by the overwhelming sense of his own inadequacy in comparison to the holiness of God. His confession of being a man of unclean lips and dwelling among a people of unclean lips reflects his recognition of his own sinfulness and the sinfulness of the society in which he lives.

Isaiah's response to the vision of God is a poignant reminder of the vast gulf that exists between the righteousness of God and the sinfulness of humanity. It serves as a powerful illustration of the truth that all have sinned and fall short of the glory of God (Romans 3:23). Isaiah's acknowledgement of his unworthiness is a reflection of the biblical principle that no one is righteous, not even one (Romans 3:10).

The symbolism in this verse is significant. The "unclean lips" that Isaiah refers to symbolize the sinful nature of humanity. In the Bible, the mouth is often used as a symbol of the heart and the words that come from the mouth are indicative of the state of one's heart. Isaiah's confession of unclean lips is a recognition of the impurity of his own heart and the sinful state of the people he lives among.

The vision of the King, the Lord of hosts, represents the overwhelming holiness and majesty of God. In the Old Testament, the title "Lord of hosts" denotes God's sovereignty and authority over all the armies of heaven and earth. Isaiah's response to this vision highlights the power and glory of God in contrast to his own sinfulness and inadequacy.

Isaiah's recognition of his own sinfulness is a necessary precursor to his commissioning as a prophet. It is only after he confesses his unworthiness that he is purified and made ready to receive his divine calling. This reflects the biblical truth that God uses imperfect and flawed individuals to accomplish His purposes. It is not our own righteousness that qualifies us for service to God, but rather His grace and mercy.

In conclusion, Isaiah 6:5 is a powerful and moving expression of Isaiah's deep sense of unworthiness and guilt in the presence of the holy and righteous God. It serves as a profound reminder of the vast gulf that exists between God's holiness and our sinfulness, as well as the need for confession and purification in order to serve Him. This verse is a poignant reflection of the biblical truth that all have sinned and fall short of the glory of God, and the desperate need for His grace and mercy in our lives.