Exodus 3:13-15 (NKJV)
13 Then Moses said to God, "Indeed, when I come to the children of Israel and say to them, 'The God of your fathers has sent me to you,' and they say to me, 'What is His name?' what shall I say to them?"
14 And God said to Moses, "I AM WHO I AM." And He said, "Thus you shall say to the children of Israel, 'I AM has sent me to you.' " 15 Moreover God said to Moses, "Thus you shall say to the children of Israel: 'The Lord 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 this is My memorial to all generations.'
"I AM" is a strange name isn't it? Why would God pick a name such as "I AM"? I am glad he did not say that His name is "I WAS" or even "I WILL BE." You get a glimpse of the idea that God is timeless. Eternity is always in the present. I have thought a lot about the physics of Eternity if such a thing can even be comprehended.
I heard one preacher say that we can think of God's name as I AM ________ where you fill in the blank for whatever you need right now. That is certainly true for God can supply all of our needs. But I think this name must be far more profound. Jesus replied to the soldiers who were looking to arrest him saying, "I am He." In my Bible, the He is italicized meaning that that word is not in the original Greek. He was speaking his eternal name. Then notice what happened to the soldiers, they fell backward to the ground. The force of that name spoken by God Himself must be awesome!
John 18:4-6 (NKJV)
Jesus therefore, knowing all things that would come upon Him, went forward and said to them, "Whom are you seeking?" They answered Him, "Jesus of Nazareth." Jesus said to them, "I am He" And Judas, who betrayed Him, also stood with them. 6 Now when He said to them, "I am He, " they drew back and fell to the ground.