Correspondence of the Planets to the Liberal Arts

A chart of the seven heavens and the liberal art that Dante pairs with each in the Convivio.

Heaven Planet Liberal Art Dante’s Rationale
1 The Moon Grammar (disciplines the mind) Like grammar, the moon shows two properties: the Moon’s alternating brightness and shadow mirror the beginner’s struggle with clarity and confusion in language
2 Mercury Dialectic/Logic (removes ambiguities) Mercury’s rapid, subtle motion corresponds to the quick, incisive nature of dialectical reasoning.
3 Venus Rhetoric (adorns discourse and persuades through sweetness, shaping the soul’s emotional response to truth) Venus, the planet of beauty and persuasion, aligns with Rhetoric, which moves the affections through ornamented speech
4 The Sun Arithmetic (gives the intellect clarity, proportion, and the foundation of all order) The Sun, source of illumination, corresponds to Arithmetic, the science that “illuminates” all others through number.
5 Mars Music (captivates the spirit, causing hearers to nearly cease all activity) Mars, associated with harmony-in-conflict and martial rhythm, corresponds to Music, the science of proportion in sound.
6 Jupiter Geometry (gives the mind stable proportion and rectitude, training the mind to perceive harmonious spatial order) Jupiter’s temperate and orderly nature mirrors Geometry, the science of spatial proportion and harmonious measure.
7 Saturn Astronomy/Astrology (teaches the motions of the heavens and perfects intellectual vision) Saturn, highest of the planetary spheres, corresponds to Astronomy—the study of the heavens themselves.