Albert Barnes Commentary Isaiah 44:21

"Remember these things, O Jacob, and Israel; for thou art my servant: I have formed thee; thou art my servant: O Israel, thou shalt not be forgotten of me." — Isaiah 44:21 (ASV)

Remember these - Remember these things which are now said about the folly of idolatry and the vanity of worshipping idols. The object of the argument is to turn their attention to God and to lead them to put their trust in him.

You are my servant - (See the notes at Isaiah 42:19; Isaiah 43:1).