Both Uses of
mystic
in
Song of Myself
- hankering, gross, mystical, nude;
How is it I extract strength from the beef I eat?†*mystical = relating to realities beyond scientific understanding OR inspiring a sense of wonder or mystery; or beyond human comprehension
- It alone is without flaw, it alone rounds and completes all,
That mystic baffling wonder alone completes all.†
Definition:
a person who seeks or claims to have direct spiritual insight beyond ordinary understanding; or an experience that feels deeply spiritual, mysterious, or otherworldly
In common usage, mystic is more likely to be used in reference to a practitioner of a less mainstream religion than a more mainstream religion -- possibly because the former is more mysterious to the writer.