Truth learned from another is of no value. At best we take custody of a lifeless carcass. The only truth which is vital and effective is the truth we discover ourselves.
Theories and doctrines are fabrications of the mind, but genuine spiritual teachings are different. They are designed to turn this way and that; pointing one way, then another; directed beyond name and form.
Yes, spiritual teachings are meant to perplex - in order that you might come to seek meanings.