“I will go before you.
I will level the mountains.
I will break into pieces
The doors of bronze.
I will cut through the bars of iron.
I will give you the treasures of darkness.
I will give you riches hidden in secret places.
Thus you may know
That it is I,
The God of Israel,
Who call you by your name.”
Second Isaiah says that Yahweh, in the first person singular, will clearly help Cyrus, since he will go before him to set things up for him. Yahweh was going to level the mountains. He was going to break down the bronze doors with their iron bars. He was going to give Cyrus the treasures and the riches from dark and secret places. In case there was any doubt, it was Yahweh, the God of Israel, who has called Cyrus by name to do his work.