John Calvin Commentary Isaiah 22:19

"And I will thrust thee from thine office; and from thy station shalt thou be pulled down." — Isaiah 22:19 (ASV)

And I will cast thee out. He says nothing new, but concludes the former prediction. Though in the next verse he will again mention Shebna, yet he now gives a brief summary of what has already been said.

Shebna thought that he had a fixed dwelling in Jerusalem, believing that, whatever might happen, he could not be driven or removed from it.

But the Lord threatens that he will cast him out and banish him to a distant country. Thus, the Lord frequently overturns the thoughts of the wicked (Psalms 33:10), who, relying on their cunning and dexterity, manipulate public affairs according to their own pleasure.

The change of person shows that the Prophet speaks sometimes in his own name and sometimes in the name of God.