Compare the line from Avadhut Gita with the Medieval European Alchemical formula:
Like the firmament, constellated with stars
He’s not bound, like thief to his galley oars,
But free and powerful, to no order bows,
Stars contained within him, the world is prose.
In the context of my book, and our tradition, you may see the dome of the sky as a reflection of the dome of our speech, from our throat to our lips. You may also see the analogue of the possibilities of human speech (reflecting the boundaries of human knowledge) reflecting all the stars in the sky; the “speech” of the sky containing within it The Book of the World. This is the direction I can suggest for you to travel, to go deeper into the power of Dattatreya’s statement.