10 Moses said to the Lord, “Pardon your servant, Lord. I have never been eloquent, neither in the past nor since you have spoken to your servant. I am slow of speech and tongue.”

11 The Lord said to him, “Who gave human beings their mouths? Who makes them deaf or mute? Who gives them sight or makes them blind? Is it not I, the Lord? 12 Now go; I will help you speak and will teach you what to say.”

Verse 12 is an encouragement to every preacher. God will give the content of the message and the courage to speak it.

But Moses really didn’t want to do this thing did he? His next excuse concerned a supposed deficiency in speech:

‘Moses no doubt had lost most of his eloquence after forty years of tending sheep! (Acts 7:22,29-30).

Patiently, through a series of rhetorical questions, God revealed to Moses that if He had given him his mouth, He surely would help him use it (Mark 13:11). Whatever inability Moses thought he had, God would overcome it.’ Tom Hale: ‘Applied Old Testament Commentary’, p.213.

Acts 7:22 says: “Moses was educated in all the wisdom of the Egyptians and was powerful in speech and action.”  What he had once been, and maybe was no more, God could make him again – and even more so.

‘Moses completely missed the message of God’s name and God’s miraculous power. “I AM” is all that we need in every circumstance of life, and it’s foolish for us to argue, “I am not.”…The God who made us is able to use the gifts and abilities He’s given us to accomplish the tasks He assigns us.’ Warren W. Wiersbe: ‘Old Testament Commentary’, p.151.