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…water, Saint Augustine explains in On Genesis to the Letter, Book 3, Chapter 6, in these words: “The firmament, in which the luminaries are, is contained partly by the upper air, partly by ethereal fire.” He expands on this more fully in Chapters 7, 9, and 10, where he does nothing else but dissuade those who consult his writings from the rigid hardness of…
https://www.wichita.edu/academics/fairmount_las/geology/wparcell/Kircher/IterII/IterExI_02_Prelude.php