because
Ezekiel 43:2-4
2
and behold, the glory of the God of Israel was coming from the way of the east. And His voice was like the sound of many waters; and the earth shone with His glory.
3
And [it was] like the appearance of the vision which I saw, like the vision which I saw when He came to destroy the city. And the visions [were] like the vision which I saw by the river Chebar; and I fell on my face.
4
And the glory of the LORD came into the house by the way of the gate facing toward the east.
Exodus 24:10
and they saw the God of Israel; and under His feet there appeared to be a pavement of sapphire, as clear as the sky itself.
Isaiah 6:1-5
1
In the year of King Uzziah's death I saw the Lord sitting on a throne, lofty and exalted, with the train of His robe filling the temple.
2
Seraphim stood above Him, each having six wings: with two he covered his face, and with two he covered his feet, and with two he flew.
3
And one called out to another and said, "Holy, Holy, Holy, is the LORD of hosts, The whole earth is full of His glory."
4
And the foundations of the thresholds trembled at the voice of him who called out, while the temple was filling with smoke.
5
Then I said, "Woe is me, for I am ruined! Because I am a man of unclean lips, And I live among a people of unclean lips; For my eyes have seen the King, the LORD of hosts."