I agree it has to be a passion as it is a difficult and complex subject and many fall by the wayside in their studies and dont complete.Yup, its called Passion with a capital"P".
I am one that has been enamoured of it all for many many years and I feel it is really a calling of a sort. We need a strong Uranus for sure or 11th house or Aquarian planets to stick with astrology......Jupiter connections also help as do planets in the 8th of the metaphysical realms and the 12th for spiritual yearnings. The 9th for a sense of faith and learning the Universal truths. Any and all of these combinations.. Pluto for obsession, passion and tenacity......