Isaiah 6: tells the story of Isaiah's commissioning by the Lord.
This happens after King Uzziah died after reigning for 52 years. Isaiah begins to recognize that the throne of David is now empty. The overwhelming nature of knowing that Isaiah was possibly going to be placed in the space that once was held by such a victorious king overwhelms him. Isaiah begins to question what the Lord is doing. He questions his own abilities and inadequacies.
Isaiah calls out to God of these shortcomings in verse 5 saying: "I am ruined! For I am a man of unclean lips, and I love among people of unclean lips, and my eyes have seen the King, the Lord Almighty."
This is the same question that many powerful leaders whom God has appointed have gone through. Questioning themselves and how can God possible use them. They recognize the lies of their failures and the corruption of their own sin. This causes them and us - to feel deep inadequacy when standing before the presence of the almighty God.
Yet what does God say about us:
"You are worthy."
Despite all the lies that we believe about ourselves to be true - the things that we hide from others or the same we feel. God knows all these things. He created all these things and is not surprised. He looks at us and says "you are worthy." I believe in you. I have faith in you. I am preparing you for a purpose. You may feel inadequate. You may feel unqualified for what I am going to use you for. But I know you -- and I know you are qualified.
Who are we to question our Creator?
After Isaiah realizes their is perfect atonement for his sins by being touched by a seraph (v. 6-7) his response changes. He becomes willing to move wherever God desires to send him. He forgets about his failures or shortcomings. He steps out and has faith that God is who God says he is and because of that he can take a step and walk fully trusting in the character of who God is. God has declared him worthy and forgive and because of that Isaiah responds passionately.
And I said, "Here I am! Send me."
I believe Jesus is seeking for us to really understand that we have been atoned for our sins. The things that we have done wrong that we are ashamed of will not keep us from God's purpose for our lives. We must understand that we are truly forgiven and because we are truly forgiven we have the ability to be used by God how he desires to use us. We are able to overcome the pits of hell that sin created and walk faithfully into righteousness at our Father's side. The world will continue to tell us we are unworthy but the perfect act of the death of a righteous man on a cross shows our lives are worth much more. We are loved and forgiven.
Isaiah 7:9
If you do not stand firm in your faith,
you will not stand at all.