"But I will harden Pharaoh's heart, and though I multiply my miraculous signs and wonders in Egypt, he will not listen to you." Exodus 7:3-4a
Moses was so worried about his speaking ability that he moaned and groaned when God told him to tell Pharaoh to free the people of Israel. He feared Pharaoh wouldn't listen to him.
The truth was: Pharaoh wasn't going to listen - no matter how eloquent the speaker might have been! It didn't matter that Moses couldn't speak well. God already had a plan. He would harden Pharaoh's heart, so any man's words would fall on deaf ears. Moses worried for nothing!
Lord, forgive me for the time I have faltered because I feel weak and unworthy. You have plans that I don't understand. Many times Your plan is to show Your strength through my weakness. Continue to pour Your Spirit through me, so others might be blessed.