Wednesday with Words: The Quadrivium is all about Math

[T]he quadrivium is essential to a liberal education in the traditional sense. And since we can normally only advance from sense-perception to intellectual intuition by way of intellectual argumentation, the quadrivium necessarily involved the study of number and its relationship to physical space or time, preparatory to the study of philosophy (in the higher sense of that word) and theology: arithmetic being pure number, geometry number in space, music number in time, and astronomy number in both space and time.
(Stratford Caldecott, Beauty for Truth’s Sake, pp. 23-24)

Elaienar made a graphic for me.
Isn't it pretty?