Jerome wrote about 410 AD: We have talked about standing; we have talked about walking; let us talk about sitting. Whenever God is represented as seated, the portrayal takes one of two forms: either he appears as the ruler or as the judge. If he is like a king, one sees him as Isaiah does: “I saw the Lord seated on a high and lofty throne.” There he is presented as the sovereign king.
Isaiah was given a gift that only a dozen or so have received, he ‘saw’ God. God has already told us that no human can see God and live, so we must take this to mean he saw the presence, the outer manifestation of God; or as Isaiah put it: his train filled the sanctuary. NJB
Even so, Isaiah was aware of his filth. He cried out:
“Doom! It’s Doomsday!
I’m as good as dead!
Every word I’ve ever spoken is tainted—
And the people I live with talk the same way,
using words that corrupt and desecrate.
And here I’ve looked God in the face!
The King! God-of-the-Angel-Armies!” MSG
Isaiah did what we all must do, he recognized his sin and his unworthiness to be in the presence of God. With that admission, he was made clean with the fire of the Altar of the Heavenly Temple. That is, he was made clean by the sacrifice of the Messiah, the Son of God.
Isaiah at once took up the struggle that God had not yet laid before him. Isaiah said, Send me, before God told him were to go and what to say.
Are you ready to be sent? God has a job waiting for every person on earth. We need only say yes.
Be righteous and do good.