I don't recall if I previously mentioned in the thread above that when one follows the Sabian Symbols in the traditional fashion, i.e. counter-clockwise, then you are reading the chart for a mundane interpretation and while the Asc. and Desc., r.e. The "WHO" and the "WHERE-TO", respectively, remain the same the roles of the M.C. and the I.C. are reversed. Thus in a mundane interpretation, the M.C.'s symbolic role is that of "WHY" and it's the I.C. that becomes "HOW.
As one progresses from the Asc. to the destination of the Desc., the "WHERE-TO" you travel in a counter clockwise direction and that's why the I.C. becomes the "HOW" because, if you don't conduct the process of transformation through that degree and thus become aware of "HOW" to proceed, the way to the destination becomes lost or altogether unknown. The "WHY" is always what one realizes after everything else has been taken care of.
In the spiritual evolutionary transformative direction the point of 'HOW" is the M.C. ...and isn't that far more appropriate as to be the location of the "HOW"? It's the cusp to the 10th House, the House of Service, of Career?
It's also the tip of a pentagram, a Grand Quintile, pointing upward to Heaven.
(as there is a pentagram one can construct to their M.C. that does have very much to do with your life as it is the story of 'HOW".
Dane Rudhyar pointed out that every one of the 72 perfect pentagrams one can construct to the degrees of the Zodiac is the perfect plot for a story.
I find it extremely interesting as for the reason Marc Edmond Jones started making a very tidy sum, on a somewhat regular basis, selling movie scripts to Hollywood beginning not long after He had the marvelous clairvoyant, Elsie Wheeler, ascertain them for him.