Besides, Adam and Eve, Moses was the next to speak with God up on the mountain, the burning bush. He asked what he should be called..

“And God said unto Moses, 'I AM THAT I AM. Thus shalt thou say unto the children of Israel, I AM hath sent me unto you. ' ” God sent Moses forth in the name of the Lord (Yahweh), the great I AM. In giving to Moses His name, God gave Moses the key to overcome his fear of rejection.