Charles Ellicott Commentary Isaiah 41:4

"Who hath wrought and done it, calling the generations from the beginning? I, Jehovah, the first, and with the last, I am he." — Isaiah 41:4 (ASV)

I the Lord ... —The words are the utterance of the great thought of eternity which is the essence of the creed of Israel (Psalms 90:2; Psalms 102:26), and appear in the Alpha and Omega of Revelation 1:11; Revelation 4:8. The identical formula, I am He, appears in Isaiah 43:10; Isaiah 43:13; Isaiah 46:4; Isaiah 48:12. It is probably used as an assertion of an eternal being in the I AM of John 8:58.