“--- we nevertheless expel the heavenly element from music when we obliterated the possibilities of contacts with spiritual forces by disfiguring the intervals (tempered scales).  When music is thus reformed it loses its true purpose, and its magical effects, henceforth uncontrolled, can become dangerous.  It is not without reason that Plato has Damo, the last of the great Pythagorean teachers, declared that ‘One cannot touch (alter) the musical modes without disrupting the Constitution of the State”

(Danielou, Music and the Power of Sound - Rochester 1943)