Isaiah continues to describe his vision.
## Each one called to another and said ##
“The seraphim called out to one another” or "The creatures proclaimed to one another"
## Holy, holy, holy ##
Repeating the word "holy" three times indicates God is completely holy. Alternate translation: "He is holy beyond all else" or "He is completely holy." (UDB)
## The whole earth is full of his glory ##
“The glory of Yahweh fills all the earth”