mysticism
noun
[ ˈmɪstɪsɪz(ə)m ]
• belief that union with or absorption into the Deity or the absolute, or the spiritual apprehension of knowledge inaccessible to the intellect, may be attained through contemplation and self-surrender.
• "St Theresa's writings were part of the tradition of Christian mysticism"
• vague or ill-defined religious or spiritual belief, especially as associated with a belief in the occult.
• "there is a hint of New Age mysticism in the show's title"