A lot of the information dump that Rui had thrust on them was overwhelming. He offered them a complex worldview of what the true nature of reality was, and even though Martial Sages were capable of complex considerations, metaphysics was not their strong suit.
It was difficult for them to fathom the invisible overlapping layer of reality that was abstract and immaterial, comprising the information that described reality itself. It was even more difficult for them to fathom that consciousness was integrated information, which was a whole other complex matter itself.
On top of that, the condition to break through to the Transcendent Realm, the Enlightenment of Transcendence, was also difficult for them to wrap their head around. Phenomenological uniformity was indeed another complex matter of philosophy that they simply weren't equipped to dissect.
