“In the year that King Uzziah died, I saw the Lord seated on a throne, high and exalted; and the train of His robe filled the temple. Above Him stood seraphim, each having six wings: With two wings they covered their faces, with two they covered their feet, and with two they were flying. And they were calling out to one another: “Holy, holy, holy is the LORD of Hosts; all the earth is full of His glory.” At the sound of their voices the doorposts and thresholds shook, and the temple was filled with smoke.”
Isaiah sees the Lord enthroned while angels call out his holiness again and again, and the whole place shakes. Holiness here is the overwhelming otherness of God.

