10 And Moses said to the Lord, O Lord, I am not a man of words; I have never been so, and am not now, even after what you have said to your servant: for talking is hard for me, and I am slow of tongue. 11 And the Lord said to him, Who has made man's mouth? who takes away a man's voice or hearing, or makes him seeing or blind? Is it not I, the Lord? 12 So go now, and I will be with your mouth, teaching you what to say. 13 And he said, O Lord, send, if you will, by the hand of anyone whom it seems good to you to send. 14 And the Lord was angry with Moses, and said, Is there not Aaron, your brother, the Levite? To my knowledge he is good at talking. And now he is coming out to you: and when he sees you he will be glad in his heart. 15 Let him give ear to your voice, and you will put my words in his mouth; and I will be with your mouth and with his, teaching you what you have to do. 16 And he will do the talking for you to the people: he will be to you as a mouth and you will be to him as God. 17 And take in your hand this rod with which you will do the signs.
Matthew Henry's Commentary on Exodus 4:10-17
Commentary on Exodus 4:10-17
(Read Exodus 4:10-17)
Moses continued backward to the work God designed him for; there was much of cowardice, slothfulness, and unbelief in him. We must not judge of men by the readiness of their discourse. A great deal of wisdom and true worth may be with a slow tongue. God sometimes makes choice of those as his messengers, who have the least of the advantages of art or nature, that his grace in them may appear the more glorious. Christ's disciples were no orators, till the Holy Spirit made them such. God condescends to answer the excuse of Moses. Even self-diffidence, when it hinders us from duty, or clogs us in duty, is very displeasing to the Lord. But while we blame Moses for shrinking from this dangerous service, let us ask our own hearts if we are not neglecting duties more easy, and less perilous. The tongue of Aaron, with the head and heart of Moses, would make one completely fit for this errand. God promises, I will be with thy mouth, and with his mouth. Even Aaron, who could speak well, yet could not speak to purpose, unless God gave constant teaching and help; for without the constant aid of Divine grace, the best gifts will fail.