Then there was music. Plato had always been aware of the power of music to stir human emotions, both for good and for ill. Pythagoras had also made Plato and the Academy aware of how music expressed the same divine order of number and proportion as in geometry. Plotinus had passed this Platonic fascination with music and number to Saint Augustine, who saw both as reflections of a divine order catastrophically disrupted by Adam’s Fall.

