Water does not ferry people across; people must cross by themselves. --Tao Te Ching
The world has two sides. One is inhabited by humans, the other by spirits.
What are spirits? They are the lingering attachments of the dead. But just as people can be good or evil, so can spirits.
In an alley in Lingyuan City stands a curious agency that specializes in resolving strange and unusual cases. The people there call themselves spirit guides.
The truly reclusive live hidden in the city; cultivating in the mortal world is also a way to cultivate the heart.
Perhaps an immortal is simply a “person” with extraordinary power.