Now Moses was keeping the flock of his father-in-law, Jethro, the priest of Midian, and he led his flock to the west side of the wilderness and came to Horeb, the mountain of God. And the angel of the LORD appeared to him in a flame of fire out of the midst of a bush. He looked, and behold, the bush was burning, yet it was not consumed. And Moses said, “I will turn aside to see this great sight, why the bush is not burned.” When the LORD saw that he turned aside to see, God called to him out of the bush, “Moses, Moses!” And he said, “Here I am.” Then he said, “Do not come near; take your sandals off your feet, for the place on which you are standing is holy ground.” And he said, “I am the God of your father, the God of Abraham, the God of Isaac, and the God of Jacob.” And Moses hid his face, for he was afraid to look at God.
Then the LORD said, “I have surely seen the affliction of my people who are in Egypt and have heard their cry because of their taskmasters. I know their sufferings, and I have come down to deliver them out of the hand of the Egyptians and to bring them up out of that land to a good and broad land, a land flowing with milk and honey, to the place of the Canaanites, the Hittites, the Amorites, the Perizzites, the Hivites, and the Jebusites. And now, behold, the cry of the people of Israel has come to me, and I have also seen the oppression with which the Egyptians oppress them. Come, I will send you to Pharaoh that you may bring my people, the children of Israel, out of Egypt.” But Moses said to God, “Who am I that I should go to Pharaoh and bring the children of Israel out of Egypt?” He said, “But I will be with you, and this shall be the sign for you, that I have sent you: when you have brought the people out of Egypt, you shall serve God on this mountain.”
Then Moses said to God, “If I come to the people of Israel and say to them, ‘The God of your fathers has sent me to you,’ and they ask me, ‘What is his name?’ what shall I say to them?” God said to Moses, “I AM WHO I AM.” And he said, “Say this to the people of Israel: ‘I AM has sent me to you.’” God also said to Moses, “Say this to the people of Israel: ‘The LORD, the God of your fathers, the God of Abraham, the God of Isaac, and the God of Jacob, has sent me to you.’ This is my name forever, and thus I am to be remembered throughout all generations. (ESV)
Doug Stuart writes:
By authorizing Moses to say, “I AM/CAUSE TO BE” has sent me to you,” God made Moses his ambassadorial representative, that is, prophet, assigned to speak on his behalf to the Israelites. They would have recognized, if they perceived the situation correctly, that what he said was not of his own making but was the word of Yahweh, the God of their forefathers.
What had just been revealed in terms of the divine name was now reiterated [in verse 15] with connection to the Patriarchs, so that the Israelites in Egypt would be able to properly draw the conclusion that Moses was not coming to them in the name of a new god but the true God of old, the God their own ancestors worshiped, and thus the God who should logically be their national deliverer. God also made clear that the third-person form of his name, Yahweh, was to be employed immediately (since no human could use it properly in the first-person form) and would identify him to his people for the generations thereafter.
MEMORY WORK – Shorter Catechism Q/A 99
Q. 99. What rule hath God given for our direction in prayer?
A. The whole word of God is of use to direct us in prayer; but the special rule of direction is that form of prayer which Christ taught his disciples, commonly called the Lord’s prayer.