Isaiah 41:4. “Who hath wrought and done it, calling the generations from the beginning? I the Lord, the first, and with the last, I am He.”
This verse claims the omniscient–all knowing–God. He was First, His is Last. He has called each generation from the beginning of the existence of mankind on the earth.
Jehovah is the Aleph-Tau and the Alpha-Omega of the Bible–the first and the last; from eternity to eternity, the Self-existent, and the Eternal (44:6; 48:12; Rev. 1:11, 17; 2:8; 22:12).
The Word of God is consistent from the beginning to the end in many references to God calling Himself I AM. This is not an easy concept for us. It’s meaning is that He has always existed, and always will. He has no beginning, no ending. He is the beginning and the end of all that He created. His knowledge so far surpasses ours that they simply cannot be compared. We would save ourselves a lot of frustration if we would simply realize that we can never understand God in this life, but that He completely understands us.