Definitions of mystic:

• noun:   someone who believes in the existence of realities beyond human comprehension
• adjective:   relating to or characteristic of mysticism

  Example: "Mystical religion"

• adjective:   relating to or resembling mysticism

  Example: "Mystical intuition"

• adjective:   having an import not apparent to the senses nor obvious to the intelligence; beyond ordinary understanding

  Example: "The mystical style of Blake"