And even to your old age I am he; and even to hoar hairs will I carry you: I have made, and I will bear; even I will carry, and will deliver you.
(Even) to (your) old age - as your ... you ... you, are not in the Hebrew, the sentiment is more general than the English version, though of course it includes the Jews from the infancy to the more advanced age of their history (Isaiah 47:6).
I am he - i:e., the Same (Psalms 102:27; John 8:24; Hebrews 13:8).
I have made, and I will bear ... carry ... deliver. Not only do I not need to be borne and carried myself, as the idols (Isaiah 46:1), but I will bear, carry, and deliver my people.