Chatting With the Burning Bush

Now Moses was tending the flock of Jethro his father-in-law, the priest of Midian, and he led the flock to the far side of the desert and came to Horeb, the mountain of God. There the angel of the LORD appeared to him in flames of fire from within a bush. Moses saw that though the bush was on fire it did not burn up. So Moses thought, "I will go over and see this strange sight—why the bush does not burn up."
When the LORD saw that he had gone over to look, God called to him from within the bush, "Moses! Moses!" And Moses said, "Here I am."
"Do not come any closer," God said. "Take off your sandals, for the place where you are standing is holy ground."

Exodus 3:10-12
"So now, go. I am sending you to Pharaoh to bring my people the Israelites out of Egypt."
But Moses said to God, "Who am I, that I should go to Pharaoh and bring the Israelites out of Egypt?"
And God said, "I will be with you.

Exodus 4:1-5
Moses answered, "What if they do not believe me or listen to me and say, 'The LORD did not appear to you'?"
Then the LORD said to him, "What is that in your hand?"

"A staff," he replied. The LORD said, "Throw it on the ground." Moses threw it on the ground and it became a snake, and he ran from it.

Then the LORD said to him, "Reach out your hand and take it by the tail." So Moses reached out and took hold of the snake and it turned back into a staff in his hand.

"This," said the LORD, "is so that they may believe that the LORD, the God of their fathers—the God of Abraham, the God of Isaac and the God of Jacob—has appeared to you."