Mystic experiences are beyond normal human experience; ineffable, sublime, nontransferable, very much unbelievable divineexperiences. Often they use metaphors to describe their personal experiences, and sometimes they use poetry or other forms of art.
We try to get as much precise (precision), clear (clarity using science) as we can get in terms of perception and understanding/analysis of reality or any type of communication (unambiguous). While we prefer to use art only as a form of entertainment or something not really important.