The Quadrivium:— 4 Arithmetic, 5 Geometry, 6 Music, and 7 Astronomy. The Quadrivium (which pertains to Matter & Quantity)- the advanced four. 4 ARITHMETIC — Number in itself, which is a pure abstraction; that is, outside of space and time. 5 GEOMETRY — Number in space. 6 MUSIC OR HARMONIC THEORY — Number in time. Related posts: Educational Lectures: The Giza Power Plant – Technologies of Ancient Egypt Enlightening
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