For someone caught up in the rational mindset that Westerners generally depend on, it may seem a relatively simple manner to decide which teachings have value and which can be rejected.
But these distinctions are actually a product of a particular and limited approach to knowledge. Like other people throughout history, Westerners tend to reject knowledge that they do not understand.
Even individuals who recognize the limited value of scientific methods in many domains are still guided at a subtle level by the criteria for truth that science has set in place.
Instead of being rational in the sense of `wise, reasonable, sensible, and sound’, they cling to notions of rationality that may not apply to the spiritual path.
Relying on familiar patterns of knowing, they choose a course that can more easily obscure new knowledge rather than bring it to light.
Tarthang Tulku Rinpoche
Mind over Matter