Of the symbolism of these Heavens he says, Convito , II 14:⁠—

“As narrated above, the seven Heavens nearest to us are those of the Planets; and above these are two movable Heavens, and one motionless over all. To the first seven correspond the seven sciences of the Trivium and Quadrivium; that is, Grammar, Dialectics, Rhetoric, Arithmetic, Music, Geometry, and Astrology. To the eighth, that is, to the starry sphere, Natural Science, called Physics, corresponds, and the first science, which is called Metaphysics; and to the ninth sphere corresponds Moral Science; and to the Heaven of Rest, the Divine Science, which is called Theology.”