We need to perform very specialized work under a very specific set of conditions to reveal the influence of the Upper Light upon us. Thus, the absence of any feelings, flavors, or understanding while we study The Zohar doesn’t mean a thing.
You don’t need to feel or understand; you simply need to stay open for the influence of the Light, and let it work on you. The environment has to attune us to the correct desire so that we become eager to be influenced by the Light even if we lack the connection to what we read, taste, or understand.
This is what we call the “miraculous force” (Segula) that is implanted into The Book of Zohar. This hidden mechanism (rather than the stories or words) somehow works on us and moves us forward.
When studying The Zohar we need to “trust the sages,” meaning we need to believe the advice of the Kabbalists. We have to constantly take care of how to align ourselves with the perception of the force that is yet concealed from us.