Sima Chengzhen (司马承祯): A Daoist Sage of the Tang Dynasty

Sima Chengzhen (647-735), styled Ziwei, with the religious name Daoyin and also known as Baiyunzi, was a native of Wen in Henei (present-day Wen County, Henan Province) and a renowned Taoist priest in the Tang Dynasty.

Born into an official family, Sima Chengzhen despised officialdom from his youth and advocated Taoism. At the age of 20, he entered the Taoist register and studied under Pan Shizheng, the 11th-generation patriarch of the Shangqing School, on Mount Song.

In the early years of the Kaiyuan era of the Tang Dynasty (713), Sima Chengzhen came to Mount Heng and built the Baiyun Nunnery one li north of the Jiuzhen Temple, where he preached and practiced Taoism. According to records, he not only enjoyed great fame in Taoist theories such as cultivation of truth, vital energy refinement, health preservation, Yin-Yang, and the Eight Trigrams, as well as in poetry and prose, but also had profound attainments in architecture and garden science. He was skilled in calligraphy, creating a unique style in seal script, official script, and regular script.

Three emperors—Wu Zetian, Emperor Ruizong Li Dan, and Emperor Xuanzong Li Longji—invited him to the palace multiple times to lecture on Taoism and answer questions about the Dharma. Emperor Xuanzong particularly invited him to Chang'an to collate and annotate Tao Te Ching and addressed him as "Dao Brother".

In the 15th year of Kaiyuan (727), when Zhang Jiuling, serving as the Jiedushi of Lingnan, paid a visit to Sima Chengzhen while on a mission to offer sacrifices to Mount Heng, he presented a poem to him: "The distance between us is like that between nine ox hairs; I am ashamed and sigh endlessly." (from After Worshiping at Southern Sacred Mountain, Paying a Visit to Taoist Priest Sima). This line implied that Zhang Jiuling both admired immortals and could not break away from officialdom, hence feeling ashamed of being "as far apart as nine ox hairs" compared to Sima Chengzhen.

Sima Chengzhen also had deep friendships with Li Bai, Meng Haoran, He Zhizhang, Wang Wei, Chen Ziang, and others, who were collectively known as the "Ten Friends of the Immortal Sect" at that time. This further reflected his profound literary accomplishment.

Statistics show that he wrote numerous works on Taoism, nearly 20 in total, including Secret Instructions for Cultivating Truth, Record of Sitting in Forgetfulness, The Hidden Master of Heaven, On the Essential Meaning of Vital Energy Absorption, Illustration of the Shangqing Image-Containing Sword Mirror, and Method of Picking and Taking Pine Leaves. He integrated the Confucian theory of "rectifying the mind and sincere intention" from The Doctrine of the Mean and the Buddhist theories of concentration and meditation, taking the studies of Laozi and Zhuangzi as the foundation, and created a set of Taoist cultivation theories and a series of cultivation principles such as "Five Gradual Gates" and "Seven Stages". It can be said that he was the most outstanding Taoist scholar after Lu Xiujing and Tao Hongjing of the Shangqing School.

Sima Chengzhen passed away in the 23rd year of Kaiyuan (735) at the age of 88, leaving more than 70 disciples.

Key Life Events & Contributions

1. From Noble Birth to Mountain Hermit

• Born into the prominent Sima clan, his ancestors served as high-ranking officials. Yet, at a young age, he renounced worldly pursuits, saying:

  "The court is a cage of gold; the mountains, a home of jade."

• At 20, he became a disciple of Pan Shizheng, the 11th Patriarch of the Shangqing (Highest Clarity) School, and mastered esoteric Daoist arts:
  • Neidan (internal alchemy)
  • Qigong (life-energy cultivation)
  • Yin-Yang and Bagua (cosmic principles)

2. The衡山 (Hengshan) Years: Building a Spiritual Sanctuary

In 713 CE (early Kaiyuan era), he settled in Hengshan, one of China’s Five Sacred Mountains, and founded Baiyun An (White Cloud Hermitage).

Table: Daily Life at Baiyun An

Time	Practice	Philosophy
Dawn	Zazen (seated meditation)	"Stillness is the mother of movement."
Midday	Writing & teaching	"Words are seeds; plant them wisely."
Dusk	Taijiquan (shadowboxing)	"Softness overcomes hardness."
Night	Stargazing & scripture study	"The heavens mirror the heart."

3. Emperors as Disciples: Three Generations of Imperial Respect

Master Sima’s fame reached the imperial court, yet he remained unswayed by power:

• Empress Wu Zetian (690–705): Sent envoys to invite him, but he declined with a poem:

  "The crane soars not for gold,
  The pine stands tall for its own sake.
  Let the dust of Chang’an stay in Chang’an—
  I keep my clouds."

• Emperor Ruizong (710–712): Asked, "What is the first rule of governance?"
  He replied:

  "A ruler is like a mirror—
  Clear, unbiased, and unattached."

• Emperor Xuanzong (712–756): Called him "Brother of the Tao" and commissioned him to annotate the Daodejing. Sima insisted:

  "This text is not for kings alone—
  It is a ladder for all souls."

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III. Intellectual Legacy: A Fusion of Three Teachings

Master Sima was a polymath who blended Daoism, Confucianism, and Buddhism:

1. Major Works

Title	Theme	Key Idea
Zuowang Lu (On Sitting in Forgetfulness)	Meditation & self-cultivation	"Forget the self, and the Tao appears."
Tianyinzi (The Master of Heavenly Silence)	Cosmology & inner alchemy	"The universe is a song; learn to listen."
Shangqing Hanxiang Jianjian Tu (Mirror of the Shangqing Sword)	Symbolism & ritual	"The sword cuts not flesh, but illusion."

2. The "Five Gates of Gradual Ascent" & "Seven Stages of Realization"

A roadmap to enlightenment:

1. Respect & Faith (Jingxin)
2. Severing Ties (Duanyuan)
3. Gathering the Heart (Shouxin)
4. Simplifying Affairs (Jianshi)
5. True Observation (Zhenguan)

Then follow the seven stages, from self-restraint to unity with the Tao.

3. Artistic & Scientific Achievements

• Calligraphy: His seal script, clerical script, and regular script merged Daoist fluidity with Confucian structure.
• Architecture: Baiyun An’s design followed Feng Shui principles, harmonizing humans with nature.
• Botany: Authored Caifu Songye Fa (Method of Gathering Pine Needles), promoting herbal medicine.

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IV. Circle of Friends: The "Ten Immortal Friends" (仙宗十友)

Master Sima’s disciples and peers included China’s literary giants:

Name	Role	Famous Exchange
Li Bai (李白)	Poet	"The sword you gave me cuts through fame."
Meng Haoran (孟浩然)	Hermit-poet	"Your clouds are whiter than mine."
Zhang Jiuling (张九龄)	Chancellor	"I am nine hairs lighter than you." (Referring to worldly burdens)

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V. Final Years & Passing

In 735 CE, at age 88, Master Sima gathered his 70 disciples and said:

"I leave you four words:
‘Pine Wind, Bright Moon’ (Songfeng Mingyue).
The pine stands firm in storms;
The moon shines clear through clouds.
Be as they are."

He then closed his eyes and departed peacefully.

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VI. Legacy: Why He Matters Today

• For seekers: His teachings offer a path to inner peace amid chaos.
• For leaders: His advice to emperors remains relevant: "Lead with humility, not force."
• For artists: His fusion of philosophy and aesthetics inspires creativity.