In Exodus 3:14, we read "God said to Moses, "I AM WHO I AM"; and He said, "Thus you shall say to the sons of Israel, 'I AM has sent me to you. Then later on, in the New Testament, Jesus revealed just Who He was when He told the pharisees who were crudely questioning Him: ""Very truly I tell you," Jesus answered, "before Abraham was born, I am! ....(John 8:58)
"I AM WHO I AM" is the English of the original paleo Hebrew which Moses wrote. It is the tetragrammaton YHWH (or YaHWeH) or the Mighty Most Powerful God of Heaven. This is the LORD you see in all caps in your Bible and mine. It is the word which we use as Jehovah.
More importantly, Yahweh, is Jesus! He said so Himself. It was Jesus Who went with Moses in the Pillar of Cloud and Fire through the Wilderness; it was Jesus Who met with Moses in the Burning Bush and then gave Moses the Law and more, which he then wrote down. It was Jesus Who visited Abraham personally in Genesis 18, right before He destroyed Sodom and Gomorrah.
This is the point - Yahweh - is the personal God. He is our personal Savior and He described His warm, loving personality this way:
"I am the Bread of Life (John 6:35)
"I am the Good Shepherd (John 10:11)
"I am the Way the Truth (John 14:6)
"I am the Light of the World" (John 8:12) and more....
Watch this short program (28 minutes) for more on just WHO the Great I am really is!!!