XIAN. Usually written using the characters for "man" and for "mountain," the character for xian is said originally to have been composed of those for "man" and for "ascend." An early dictionary explains that it refers to those who, "when they grow old, do not die." Xian means "to move into the mountains"; that is why it is written with the character for "man" next to that for "mountain." Together, these etymologies circumscribe a field of meaning that links the search for survival beyond death to mountains and to the heavens—a range that quite accurately reflects both the practice and the status of xian throughout Chinese history. It also explains why the term is translated in English either as "immortal" or "transcendent."

The xian is in the first place a human being. But unlike ordinary human beings who die and become ancestors (or roving ghosts), the xian...