Exodus 3-6 (“The Daily Walk Bible).
Here we find God giving Himself a name: “I AM WHO I AM”. The NLT interprets the phrase to mean “I am the one who always is.” It could mean one or all of the following: 1) that He is self-existent (He was not created), 2) that He is the creator and sustainer of all that exists, 3) that He is the same “yesterday, today, and forever” which means that His character doesn’t ever change, or 4) that He is eternal.
What is amazing is that Jesus identifies Himself in the same way: “Most assuredly, I say to you, before Abraham was, I AM” (John 8:58), after which the religious leaders try to stone Him! Why? Because they understood what He was saying – He was making Himself God! And this is one of the reasons why we believe that God is triune, or three in one: God the Father, God the Son, and God the Holy Spirit!