My answer to these questions:

The Call of Jeremiah
4 The word of the LORD came to me, saying,
5 "Before I formed you in the womb I knew [a] you,
before you were born I set you apart;
I appointed you as a prophet to the nations."

6 "Ah, Sovereign LORD," I said, "I do not know how to speak; I am only a child."

7 But the LORD said to me, "Do not say, 'I am only a child.' You must go to everyone I send you to and say whatever I command you. 8 Do not be afraid of them, for I am with you and will rescue you," declares the LORD.

9 Then the LORD reached out his hand and touched my mouth and said to me, "Now, I have put my words in your mouth. 10 See, today I appoint you over nations and kingdoms to uproot and tear down, to destroy and overthrow, to build and to plant."

I guess it's only a matter of time.