The contention is that sacred number and sacred geometry govern the laws of harmony which is most easily studied in music. The next logical leap is that these laws somehow relate to everything in nature both macrocosmic and microcosmic. A school of thought going right back to Plato and Pythagoras. For anyone who has read 'Timaeus' you will know what I'm talking about.
Perhaps erroneously, this school of thought dominated the minds of early astronomers right up until the last few centuries. My favourite being Johannes Kepler who's models and depictions of the solar system made of interlocking platonic solids are fascinating.
During the quest to establish a definitive periodic table of elements, the English chemist John Newlands classified the then 56 known elements into 11 groups with similar physical properties. Newlands noted that many pairs of similar elements differed by an atomic weight of eight which he likened to the musical scale.
My question to you is whether or not you think there is any validity to this view of the arts and sciences?