A mystic is the one who understands the word being.
Mystics find it pretty hard to communicate with other people about those experiences, because the very word being is inexplicable, for one has to be in order to explicate anything else.
The mystic is aware of the fact that she/he will remain alone with the most important “thing” in life, but she/he is actually never lonely – a tremendous paradox of existence.
Mysticism is often and mistakenly associated with fabulous, miraculous visions. This happens because some mystics use images when they talk about their knowledge.
The mystic could also be areligious.