Then I said, “Ah, Lord God! Behold, I do not know how to speak, for I am only a youth.” But the Lord said to me,“Do not say, ‘I am only a youth’ ;for to all to whom I send you, you shall go,and whatever I command you, you shall speak.Do not be afraid of them, I am with you to deliver you, declares the Lord.”

Jeremiah 1:6-8