‘Again, God said, let there be firmament
Amid the waters, and let it divide
The waters from the waters: and God made
The firmament, expanse of liquid, pure,
Transparent, elemental air, diffused
In circuit to the uttermost convex
Of this great round: partition firm and sure,
The waters underneath from those above
Dividing: for as earth, so he the world
Built on circumfluous waters calm, in wide
Crystalline ocean, and the loud misrule
Of Chaos far removed’

 

 — Milton, Paradise Lost.