In the first reading today, we have the call of Isaiah. On seeing God, the prophet recognises how unholy he is. The Lord sends an angel to cleanse him.
This is the problem we all have. None of us are worthy to do the work of God.
Jesus sends out the twelve. He tells them they shall be sheep among wolves and that they shall be persecuted for what they are doing. But he also says,"If anyone declares himself for me in the presence of men, I shall declare myself for him in the presence of my Father." Think of what that means.
Imagine the Father saying "Who are you?" and Jesus interjecting, "It's alright, Father, let him in, he is a friend of mine!"