We get 108 lifetimes to either evolve and become a Master, or devolve back into the animal-plant-mineral kingdom.
I recall a lecture that says we enter each lifetime with the personality of one of the twelve astrological signs.
108 divided be 12 leaves 9.
If there are 12 possible personalities as in alignment with the Planets, what does the quotient of 9 represent? Is it another form of "personality shaping," like the Planets, but different?