Isaiah knew exactly who he was when he saw the Lord as described in Isaiah 6, “It’s all over! I am doomed, for I am a sinful man. I have filthy lips, and I live among a people with filthy lips.” When we realize how woefully inadequate we are to do anything apart from God, that is exactly when He can use us most. Isaiah knew he was doomed but yet because he was humble and repentant, God sent Him to be God’s messenger to the people! We can be used similarly if we humble ourselves before God.