World Wide Study Bible
a Bible passage
You are my witnesses, says the Lord,
and my servant whom I have chosen,
so that you may know and believe me
and understand that I am he.
Before me no god was formed,
nor shall there be any after me.
and my servant—that is, the whole Jewish people (Isa 41:8).
formed—before I existed none of the false gods were formed. "Formed" applies to the idols, not to God. Re 1:11 uses the same language to prove the Godhead of Jesus, as Isaiah here to prove the Godhead of Jehovah.