As far as I know, there are more than eight Daoist immortals so I’m not sure what sets the eight, in the group known as The Eight Immortals (Bāxiān 八仙), apart from the rest.
Each immortal has an instrument or implement onto which the immortals may transfer his/her power. These instruments are known as the Covert Eight Immortals (暗八仙).
The exact identities of the Eight Immortals are unknown, but some of them are associated with actual historical figures born during the Tang and Song dynasties. Apparently they reside on a group of five mythical islands in the Bohai Sea, namely Mount Penglai (蓬莱) Island, Fāngzhàng (方丈), Yíngzhōu (瀛州), Dàiyú (岱輿), and Yuánjiāo (員嬌).
The Dao at the heart of Daoism is a Chinese word (道) that has several English interpretations. The ‘way’ is probably its most common English definition. Others include ‘path’, ‘key’, ‘method’ and even ‘doctrine’. However, it is generally agreed that ‘Dao’ cannot and should not be defined.
Here is Ursula K. Le Guin’s ‘rendition’ of a saying from the Daode jing (道德經) …
The way you can go
Isn’t the real way.
The name you can say
Isn’t the real name.
Heaven and earth
begin in the unnamed:
name’s the mother
of the ten thousand things.
So the unwanting soul
sees what’s hidden,
and the ever-wanting soul
sees only what it wants.
Two things, one origin,
but different in name.
whose identity is mystery.
Mystery of all mysteries!
The door to the hidden.
~ ‘Chapter 1: Taoing’, Lao Tzu: Tao Te Ching: A Book About the Way and the Power of the Way, A New English Version by Ursula K. Le Guin, with the collaboration of J. P. Seaton, Professor of Chinese, University of Carolina, Chapel Hill.(Shambhala Publications Inc., 1997)
N.B. I will be referring to the above publication in this blog as well as other translations of the Daode Jing.
Laozi (老子) or Laotzu was the philosopher said to be the author of the Daode jing (道德經), the fundamental text for the religion and philosophy of Daoism; the founder of philosophical Daoism and a deity in religious Daoism and Chinese traditional religions.
We don’t know if he really existed, but there are theories that say that he was teacher to Confucius. That, however, would have placed Laozi in the sixth century (BCE), whereas there exists a first century (BCE) version of the Daode jing.
One theory suggests that the Daode jing is a collection of sayings, compiled over several centuries, and that one of its authors is a teacher referred to naturally as Laozi, meaning ‘Old Master’.
Laozi’s personal name is said to be either Li Er (李耳) or Li Dan (李聃). Claimed by the Tang Dynasty emperors as the founder of their lineage, the sage was granted the title ‘Supremely Mysterious and Primordial Emperor’ or Taishang Xuanyuan Huangdi (太上玄元皇帝).
As a deity and religious personage, Laozi is known as the ‘Supreme Old Lord’ or Taishang Laojun (太上老君) and one of the Three Pure Ones.