Preparing to preach in the Potter's hands

So I'm almost done my preparations to preach on Acts 13:13-41 tomorrow. I have been amazingly edified, and astoundingly humbled by the process. Paul's sermon is purely brilliant. He shows that Jesus is the Christ and that the Gospel was in fact in accordance with the scriptures with a determined and relentless argument that could only be denied by the hardest of hearts.

I've done what is possible for me to prepare. I've felt led to this point, and the Pastors and Elders approached me to bring this message. I did not ask for it. The passage is dead on for my own personal bent and passions.

So here is where I'm at;

Jeremiah 18:1-6

¹ The word which came to Jeremiah from the LORD, saying: ² “Arise and go down to the potter’s house, and there I will cause you to hear My words.” ³ Then I went down to the potter’s house, and there he was, making something at the wheel. ⁴ And the vessel that he made of clay was marred in the hand of the potter; so he made it again into another vessel, as it seemed good to the potter to make.
⁵ Then the word of the LORD came to me, saying: ⁶ “O house of Israel, can I not do with you as this potter?” says the LORD. “Look, as the clay is in the potter’s hand, so are you in My hand, O house of Israel!

All that is left to be seen is if this is a process by which He is moulding me to preach, or to show me that I'm not crafted in His hands for that purpose. Like I said, I've done what is possible for me to do. Everything is in His hands.