Beside a mountain stream on Wudang, an old woman once sat on a rock, patiently grinding an iron pestle into a needle. A young Taoist practitioner, already on his way down the mountain and out of the life he had chosen, stopped to ask what she was doing. When he heard her answer, he told her the task was impossible. She did not argue. She only said: “With sufficient effort, success comes naturally.” The young man stood there a moment, then turned around and walked back up the path he had come down. Many people in China grow up with a version of this story, usually with the poet Li Bai as the boy who learns the lesson. On Wudang Mountain, it belongs to someone else: a crown prince who would one day be revered as the Great Emperor Zhenwu. A single encounter by a mountain stream saved a spiritual seeker who had already begun to lose heart.
Bidding farewell to the royal palace to seek the Way
The tradition preserved on Wudang begins far from the mountain, in a kingdom called Jingle, meaning “Pure Joy.” Its queen, Shansheng, is said to have dreamed that she swallowed the sun, and soon after she conceived a son. Taoist temples still celebrate his birthday on the third day of the third lunar month.
The prince was intelligent from childhood and devoted himself wholeheartedly to the Way. Neither the wealth and splendor of the royal palace nor the throne waiting for him could hold his heart. He vowed to attain the Great Way, subdue demons, and protect all living beings. His father wished him to stay by his side and inherit the throne, the most natural wish a king could have. The prince’s resolve never wavered. At 15, he bade farewell to his parents, left the palace, and sought a secluded valley where he could cultivate the Tao.
His single-minded devotion moved a celestial teacher, the Holy Ancestor of the Jade Purity Heaven, Ziyuan Jun. She imparted the Great Way and told him to cross the sea and travel east, where he would find a mountain of 72 peaks, one soaring into the Purple Heavens. There he could dwell and cultivate. The prince followed her guidance and found a mountain that matched her description in every detail. He crossed the stream at its foot, climbed into its forests, and chose a secluded place to live.
That mountain was anciently known as Taihe, the Mountain of Supreme Harmony. Today it is called Wudang, in northwestern Hubei Province, and the old mountain gazetteers explain the name with a phrase that sounds almost like a verdict: only Zhenwu is worthy of it. The characters wu and dang are drawn from that line.
The long silence of the mountain
When he left the palace, the prince carried a clear purpose and the teachings of a divine master. From that day on, however, he had to forge his own path, one step at a time. In the palace, every need had been met before he felt it. On the mountain, his practice was a burden he had to bear alone. The life he once knew faded into the distance, and before him lay rocky cliffs, forests, and years of austere practice.
Wudang has kept a few companions for him in its stories. Crows are said to have guided him through the dense forest, which is why the birds are still honored on the mountain as sacred messengers; a Crow Temple was built for them in the Ming Dynasty, and feeding the crows became one of Wudang’s traditional sights. A Yuan Dynasty gazetteer of the mountain adds a black tiger that stood guard over him while he cultivated in his cave.
In the Taoist sense, cultivation is not only sitting in meditation. It is the slow refinement of one’s heart and character, the patient wearing away of desires, impatience, and attachments, until what remains is pure enough to meet the Tao. It is work that rarely shows results from one day to the next.
Companions of that kind do not shorten the road, though. Cold seasons followed hot ones, and his cultivation still bore no fruit. The tradition does not describe a single disaster that broke his will. What wore him down was the slow erosion anyone who has committed to something difficult recognizes: the repetition, the solitude, the absence of any visible progress. Little by little, the prolonged hardship led him to consider giving up. He began to think of going home to the Kingdom of Pure Joy.
So one day he left his cave and set out along the mountain path toward the world below.
Grinding an iron pestle into a needle by the mountain stream
As the prince walked down toward the mountain’s exit, he passed a stream and saw an old woman seated beside a rock. In her hands was a thick iron pestle, the kind used to pound grain or medicine in a mortar, and she was slowly drawing it back and forth across the stone. The prince bowed and asked what she was grinding.
“To make a needle,” she said. He looked at the heavy bar of iron, then at the aged hands holding it, and asked the obvious question: “Isn’t that an extremely difficult task?” The old woman answered: “With sufficient effort, success comes naturally.”
In the Record of the Manifestations of the Supreme Emperor of the Mysterious Heaven, the Xuantian Shangdi Qisheng Lu, a hagiography of Zhenwu preserved in the Taoist Canon, her reply takes only four characters: gong zhi zi cheng. When the work is complete, success completes itself. The episode is filed under a title that captures what happened next: the prince awakened to the pestle becoming a needle.
He understood. The iron pestle was still thick, yet she kept grinding it. Each stroke took away only a trace of metal, and still she did not stop. He, by contrast, had not yet attained the Great Way and was already on the road out. The sight of the pestle held up his own cultivation like a mirror. He lacked no talent, guidance, or teacher. What he lacked was the willingness to keep grinding while the iron still looked like iron. He turned back at once, returned to his cave, and devoted himself to his practice.
The teacher who came back in disguise
The Qisheng Lu also reveals who the old woman was: none other than Ziyuan Jun, the same divine master who had first taught the prince the Way and sent him east. On Wudang, she is often called Ziqi Yuanjun, the Primordial Lady of the Purple Qi. Seeing her disciple’s resolve waver, she took the form of an old woman to enlighten him by grinding a needle.
A quiet beauty lies in how the legend arranges the two meetings. At the first, she showed him the path to seek the Tao; at the second, she reminded him how to walk it. She did not command him to return, nor did she reproach him for leaving. She simply let him see something, and trusted him to understand it. The master did not abandon her disciple at his weakest moment, and the disciple did not take her words lightly. The master’s kindness and the disciple’s awakening found their mutual fulfillment in that one encounter. That single step back into the mountains allowed the resolve he had shown when he left the palace to endure.
Wudang’s storytellers add one more scene. After his return, the prince broke off a plum branch and set it into a lang tree, vowing that if he attained the Tao, the branch would blossom and bear fruit. The answer took a long time. The prince cultivated on Wudang for forty-two years, long enough for the fifteen-year-old who had left the palace to become a man nearing sixty, before he attained the Tao and ascended. Then, the tradition says, the grafted branch flowered and bore fruit.
That fruit, known as langmei, became one of Wudang’s treasures. In the Ming Dynasty, it was sent to the imperial court as tribute, and when the trees bore fruit again in 1405 after years of barrenness, the Yongle Emperor took it as an auspicious sign. Even the great travel writer Xu Xiake, visiting the mountain in 1623, went looking for langmei and coaxed a few from reluctant Taoist priests to carry home as a birthday gift for his mother.
Where the stream still remembers
The stream where the old woman sat came to be known as Mozhen: “Grinding the Needle.” Old Wudang records place it near the Five Dragons Palace on the mountain’s western pilgrim route, beside a rock where a shrine to the old woman was built. Later tradition tied part of the story to a well, and on the main pilgrim road stands a temple called Mozhen Jing, the Needle-Grinding Well, also known as the Pure Yang Palace. It houses an iron statue of Ziyuan Jun, murals inside retell the story of the pestle, and a well in its Old Lady’s Pavilion is known as the Old Lady’s sacred water.
Along the same route stands Prince’s Slope, home to the Temple of Returning to Truth, first built in 1412. Its Prince’s Study Hall enshrines a statue of the young prince, and parents still bring their children there to pray for success in their studies. It is a fitting stop for a story that teachers across China have used for generations to encourage patient learning.
These shrines belong to a much larger landscape. In 1412, the Yongle Emperor of the Ming Dynasty, who credited Zhenwu with protecting him on his way to the throne, launched a building campaign on Wudang that lasted about twelve years and employed more than 200,000 soldiers and laborers. Palaces, monasteries, and temples were linked by a stone pilgrim road climbing to Tianzhu Peak, where the gilded bronze Golden Hall, completed in 1416, still crowns the summit. UNESCO inscribed the Ancient Building Complex in the Wudang Mountains as a World Heritage Site in 1994, and the site recorded some 14 million visits in 2025, according to government figures.
Most of those visitors come for the views, the temples, or a prayer of their own. Yet people walking along the mountain path still pass the place where a young seeker once stopped, listened, and turned around.
Two old women, one proverb
Many readers will know this story with a different hero. In the version many Chinese children grow up with, the boy is Li Bai, the Tang Dynasty poet, who abandons his studies as a youth and meets an old woman grinding an iron pestle by a stream. When she tells him she is making a needle, he is moved by her persistence and returns to his books. The proverb that grew from it is still a classroom staple:
as long as you put in enough effort, an iron pestle can be ground into a needle.
Chinese proverb
The Li Bai version surfaces in Song Dynasty writings, most famously Zhu Mu’s geography Fangyu Shenglan, compiled around 1239, which places it at a stream below Xiang’er Mountain in Meizhou, in today’s Sichuan, and gives the old woman the surname Wu. Historians point out that nothing from Li Bai’s own time shows he ever studied there. The Wudang version appears in Taoist writings of the late Song and Yuan dynasties. Literary scholar Zhu Yuqi, who traced both, found that the record does not settle which came first. He points instead to what Chinese scholars call the “archery target effect”: popular stories, like arrows, tend to gather around the most famous name available, and few names in Chinese culture are as famous as Li Bai’s.
Yet the two tales teach different lessons. Li Bai’s is about a restless boy and his books. Wudang’s is about a seeker who has already given up a throne, endured years of solitude, and is about to walk away from everything he has invested in. It is a story about the second crisis, the one that comes not at the start of a path, when enthusiasm carries us, but in the middle, when nothing seems to be happening at all. And in Wudang’s version, the old woman is no stranger. She is the teacher who had been watching all along.
A single thought turned him back onto his original path
When people pay homage to the Great Emperor Zhenwu in temples and Taoist shrines, they see a majestic divine figure. Originally known as Xuanwu, the Dark Warrior of the North, he was renamed Zhenwu, the True Warrior, during the Northern Song Dynasty, because the character xuan appeared in the name of an imperial ancestor and could no longer be used. His statues often show him barefoot and holding a sword, with a tortoise and a snake at his feet, the ancient emblems of the north.
Yet looking back at his spiritual journey, one can still glimpse the young prince behind the statue: he renounced a throne, lived alone deep in the mountains, and even wavered when his cultivation had not yet borne fruit. Ziyuan Jun, appearing as an old woman with a pestle, called him back from the brink of retreat, and he reaffirmed his resolve.
The story of grinding a pestle into a needle has been passed down through the ages and is often used to encourage students to study diligently. In this tale from Wudang, though, the needle stands for something deeper: the reawakening of a person’s heart for the Tao. At the beginning of a spiritual journey, one’s vows can feel unshakable. Yet as the years stretch on and hardships come one after another, it is easy to forget why one set out in the first place. To heed a warning when thoughts of giving up arise, to look inward, and to renew one’s original vows: this is what keeps the path ahead open.
Few of us will ever give up a throne or spend decades in a mountain cave. But almost everyone knows the middle of a long road: the craft that stops improving, the study that seems endless, the commitment that no longer feels the way it did on the first day. The legend does not promise that the iron will turn into a needle quickly. It only promises that it will, as long as the grinding does not stop.
On Mount Wudang, the story of the needle is still told today. That crown prince once left along the mountain path and returned along the same path. Throughout his forty-two years of cultivation, he remained true to his youthful aspiration and ultimately attained the Tao. And the words spoken beside the stream: “With sufficient effort, success comes naturally,” have stayed in the hearts of the seekers who came after him ever since the day he turned back.
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