Isaiah 6:3 have seraphs, angels, flying around the Lord’s throne in the temple,
“And they were calling to one another:
“Holy, holy, holy is the Lord Almighty;
the whole earth is full of his glory.”
And they were calling to one another:

My question, so why aren’t they singing out,

“Holy, holy, holy is the Lord Almighty;
the whole earth and all of heaven is full of his glory.”

My answer: they are speaking to each and to Isaiah a powerful reminder: everything in the earth sings of His glory, speaks to His glory, reflects His glory. (Psalms 95 and 96)

The seraphs voices are us: stop, see, listen reflect. He is everywhere