The prophet Isaiah, in the passage just mentioned, was very certain of the true God. He is the One named “the LORD.” Isaiah wrote in the Hebrew language, and in Hebrew that name is YHWH. (YHWH may be pronounced as Yahweh.) In many English Bibles, when you see the word LORD in large letters, it stands for this great name of God, YHWH.
When Eve gave birth to a child she said, “I have gotten a man with the help of the LORD” (Genesis 4:1). She knew God’s name, for He had dealt personally with her and her husband, Adam. Later, her children who turned to God “began to call on the name of the LORD (YHWH)” (Genesis 4:26). So “the LORD” is the One known from the very beginning as man’s Creator. When God told Moses to go to Egypt, Moses asked what name to use for God. In answer (Exodus 3:14-15) God said to Moses,
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.”
The name YHWH shows that God is the “I AM,” that He continues TO BE. (The name YHWH sounds like the verb “to be” in the Hebrew language.) God is the self-existing One. God does not depend on anything else for His being. Instead, all others depend on Him for their being. It does not matter whether they are angels or spirits or humans or material things—they all exist only as long as God lets them.