The quadrivium-the Classical curriculum-comprises the Four Liberal Arts of number, geometry, music, and cosmology.
Quadrivium is the first volume.
Number, music, and Geometry are metaphysical truths: life across the universe investigates them; they foreshadow the physical sciences.
Geometry is Number in space; Music is Number in time; and Cosmology expresses Number in space and time.
It was studied from antiquity to the Renaissance as a way of glimpsing the nature of reality.
The quadrivium-the Classical curriculum-comprises the Four Liberal Arts of number, geometry, music, and cosmology