Exodus 4:10 And Moses said unto the Lord, O my Lord, I am not eloquent, neither heretofore, nor since thou hast spoken unto thy servant: but I am slow of speech; and of a slow tongue.
God told Moses to go, and speak unto pharaoh, to let his people go. But Moses felt inadequate because he was a poor speaker.
Many believers also feel inadequate, and won't witness, because they can't speak with a silver tongue.
God did not accept that excuse from Moses, and neither will he accept it from us. Please come out here into the world. They desperately need to hear God's word. God will tell you what to say.