I believe the only reason(s) the east has more successful (at uniting the soul with God) mystics than the west is that in the west there is on the one hand an emphasis on knowledge (and jnana yoga is incredibly difficult, much moreso than bhakti and karma yoga or a synthesis thereof) and on the other hand due to abrahamic religion there is an emphasis on widely-approved-prophet--revealed scripture instead of on personal revelation that still rare but not just a few "chosen" people can have (often leading to scripture revealed to a select few, like the upanishads or the dhammapada, but this scripture is taught to prepare a way for personal action towards enlightenment not to create orthodoxy or orthopraxis so much). and when people like st. teresa of Avila or the Baal Shem tov had mystical experiences and attained siddhis, they were faced with a society that didnt treat them as the start of a respected guru lineage based on their personal experience with conquering the ego but that demanded compliance with orthodoxy. so you had levitating nuns who were still expected to adhere to orthodoxy, and wonder working rebbes who were expected to teach torah more than anything else! but this idea of mine is very half baked like most or all of my ideas...