what would be the wonder is if psychotherapy weren't mysterious!
it's mysterious because it deals with the human mind and the human heart (emotions), which for all of science's explorations/explanations, remains a mysterious sort of realm .... always more to explore, discover, learn, wonder about, within us and around us, in our internal relationship with ourselves and our external relationships.
mysterious-ness need not be a bad thing either - it can be an intriguing, challenging, stimulating thing.
forgive me, I am in a metaphysical sort of mood today ... semi-Zen, if you will. (one of those days where I am thinking about perception vs reality ... perception is reality, or reality is perception .... if the perception of psychotherapy is that it is mysterious, then it is, because it is your perception. nope, I'm stopping before I tangle myself up.)