Your brother Aaron will be your prophet

Exodus 6:26-7:7

But Moses said to the Lord, “Since I speak with faltering lips, why would Pharaoh listen to me?”

Then the Lord said to Moses, “See, I have made you like God to Pharaoh, and your brother Aaron will be your prophet. You are to say everything I command you, and your brother Aaron is to tell Pharaoh to let the Israelites go out of his country. But I will harden Pharaoh’s heart, and though I multiply my signs and wonders in Egypt, he will not listen to you. Then I will lay my hand on Egypt and with mighty acts of judgment I will bring out my divisions, my people the Israelites. And the Egyptians will know that I am the Lord when I stretch out my hand against Egypt and bring the Israelites out of it.”

Moses and Aaron did just as the Lord commanded them. Moses was eighty years old and Aaron eighty-three when they spoke to Pharaoh.

Now God begins a series of judgments that will teach Pharaoh and his people who the Lord is, and show them the extent of Go's power over all creation.

Why?

Moses was still afraid he speaks with faltering lips, why would Pharaoh listen to him? But all of this is not because Moses can do something, but the Lord can do anything.

So Aaron is Moses's prophet, the Lord command Aaron says to the Pharaoh.

Moses and Aaron went to talk to the Pharaoh. Them it is the beginning of the lesson to let Pharoah know who is the Lord.

How?

It is not our capability but it is the power of the Lord. Without the Lord, I can do nothing.