In the year that king Uzziah died I saw also the Lord sitting upon a throne, high and lifted up, and his train filled the temple.
All Commentaries on Isaiah 6:1 Go To Isaiah 6
Jerome
AD 420
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.