Note 669 — Chapter VI · COSMOGONY, COSMOLOGY, AND COSMOGRAPHY
Reading edition
Causae et curae, II; Kaiser’s edit., p. 49, quoted above, p. 423, note 91. The fact that Hildegard here states that if the earth were in the middle of the firmament it would have to be larger or else it would fall, would seem to necessitate belief in a flat earth contiguous with the firmament. The passage from Causae et curae, I, Kaiser’s edit., p. 23, translated above, pp. 183–184, would also seem to require the same belief.