A Journey Through the World Heritage of Korean Confucian Academies
The Philosopher Who Sought the Principles of the Universe in Nature
Series Overview
Episode 1 | Why the World Took Notice of Korea's Seowon
Episode 2 | An Hyang and Sosu Seowon — The Beginning of Korean Education
Episode 3 | Yi Hwang and Dosan Seowon — How Learning Shapes Character
Episode 4 | Ryu Seong-ryong and Byeongsan Seowon — Leadership That Protected a Nation
Episode 5 | Yi Eon-jeok and Oksan Seowon — Philosophy Perfected in Nature
Episode 6 | Kim Goeng-pil and Dodong Seowon — The Roots of Moral Scholarship
Episode 7 | Jeong Yeo-chang and Namgye Seowon — The Seonbi Spirit Beyond the Capital
Episode 8 | Kim In-hu and Pilam Seowon — The Enduring Power of Integrity
Episode 9 | Choe Chi-won and Museong Seowon — A Philosophy of Harmony
Episode 10 | Kim Jang-saeng and Donam Seowon — Ritual, Community, and Everyday Life
Episode 11 | Are Seowon Relics of the Past—or Schools for the Future?
The series concludes by revisiting Lee Bae-yong's efforts to achieve UNESCO World Heritage inscription while reflecting on what the Seonbi tradition can offer education, leadership, and humanity in the age of artificial intelligence.
By Jung Yeon-Tae
President, Korea Information Service of the Construction Industry
Oksan Seowon
The Philosopher Who Sought the Principles of the Universe in Nature
Hoegae Yi Eon-jeok: Finding Freedom in Solitude and Asking What Lies at the Root of the World
When people think of Gyeongju, they usually think first of Silla. Royal tombs, Bulguksa Temple, Seokguram Grotto, Cheomseongdae Observatory, and countless traces of a thousand-year kingdom remain across the ancient capital. Yet north of the city, beyond the fields of Angang and deep within the valley of Mount Jaoksan, another world appears. There are no towering pagodas.
There are no monumental Buddhist statues. There are only the sound of water moving through a deep valley, old trees, wooded slopes, and tiled buildings resting quietly beneath the mountains. Here stands Oksan Seowon. Oksan Seowon was established in 1572 to honor Yi Eon-jeok, an eminent scholar-official and philosopher of the early Joseon Dynasty. In 1573, it received the royal name “Oksan” and became a state-recognized academy. It later grew from a leading academy of Gyeongju into a major intellectual institution of the Yeongnam region. In 2019, it was inscribed on the UNESCO World Heritage List as one of the nine academies comprising “Seowon, Korean Neo-Confucian Academies.” ([whc.unesco.org][1])
Yet Oksan Seowon cannot be fully understood by looking only at its buildings. One must also see Dongnakdang across the valley, the forests of Mount Jaoksan, the water flowing between rocks, and the inner world of Yi Eon-jeok, who contemplated the foundations of humanity and the universe within this landscape. Oksan Seowon is both a memorial to a philosopher and a place that shows how a person may humble himself before nature and learn the principles of the world.
The Meaning Contained in the Name “Oksan”
The name Oksan literally means “Jade Mountain.” In East Asian culture, jade was not simply a precious stone. Just as rough stone is refined over time until it reveals a clear and enduring radiance, human character was believed to be perfected through lifelong learning and self-cultivation. The name Oksan therefore means more than a beautiful mountain.
It also suggests the cultivation of a character as clear as jade and as stable as a mountain. A Seowon was not merely a school for accumulating knowledge. It was a place for refining human beings. Learning was not primarily about knowing more than others.
It was about clarifying the mind. Education was not simply the acquisition of techniques for controlling the world. It was the process of aligning oneself with the deeper order of existence. Oksan Seowon has preserved this quiet meaning in the relationship among its mountain, stream, buildings, and scholarly tradition.
Who Was Yi Eon-jeok?
Yi Eon-jeok, whose pen name was Hoegae, was born in Gyeongju in 1491 and died in 1553. He served in several high government offices, including ministerial and senior council positions. Yet he is remembered not primarily for the rank he achieved, but for the philosophical depth with which he helped establish the foundations of Korean Neo-Confucianism. He played a pioneering role in the formation of Joseon Neo-Confucian thought and is regarded as an important precursor of the intellectual tradition later developed by Toegye Yi Hwang and the Yeongnam school. ([국가유산포털][2]) Yi Eon-jeok did not simply inherit a finished philosophical system from a single teacher.
Through close reading of the classics and reflection upon political reality, he independently developed his thought. He examined the relationship between Li, the underlying principle of the universe, and Gi, the concrete force through which the world takes form. For Yi Eon-jeok, philosophy was never an abstraction confined to books. How should a nation be governed? What kind of mind should a political leader possess?
How can human desire be disciplined? How can a person preserve moral integrity in adversity? These questions formed the substance of his learning. He investigated the principles of the universe, yet his inquiry always began with the human mind.
He spoke of universal order without turning away from political reality. He held high office without remaining silent before the corruption of power. In this sense, he was not merely a philosopher. He was a scholar who sought to prove philosophy through life.
A Scholar Who Did Not Yield Before Power
Yi Eon-jeok’s life was far from peaceful. He opposed the political rise of the powerful official Kim An-ro and was removed from office, returning to his hometown. He later reentered government but could not escape the political turmoil and purges of the period. Eventually, he was exiled to Gangye in northern Korea, where he died. ([국가유산포털][3]) His life reveals what learning meant to the ideal Joseon scholar. Learning was not knowledge stored in the mind.
It was the courage to say that something was wrong when it was wrong. It was the refusal to abandon principle even when personal loss followed. Yi Eon-jeok participated in public life, but he did not sell his learning to political power. He believed that office did not confer dignity upon a scholar.
Rather, the moral dignity of the scholar should guide and correct public office. For this reason, his life repeatedly moved between service and withdrawal. He entered government to serve the country. When his principles could no longer be upheld, he withdrew. When summoned again, he did not evade responsibility. He remained engaged with the world without surrendering himself to worldly desire.
Even his pen name Hoegae reflects this attitude. The character Hoe suggests obscurity, restraint, and the concealment of one’s own light. True learning does not seek to display itself. It deepens the inner self.
Dongnakdang, the House of Solitary Joy
No account of Oksan Seowon is complete without Dongnakdang. Dongnakdang was the residence where Yi Eon-jeok lived and studied after withdrawing from public office. It stands across the valley near Oksan Seowon and remains one of the most important places for understanding his life and philosophy. ([국가유산포털][4]) The name Dongnakdang means “Hall of Solitary Joy.” At first, it may sound like a place where one abandons society to enjoy private isolation.
But Yi Eon-jeok’s solitary joy did not mean loneliness or withdrawal from responsibility. It meant the joy of learning without depending upon the gaze of others. It meant the freedom to walk the path one believed to be right even without office or fame. It meant finding companionship in books, nature, and one’s own conscience, even when public praise was absent.
Solitary joy was not the pleasure of one who had rejected the world. It was the joy of one who had become free from the world’s compulsions. At Dongnakdang, Yi Eon-jeok read and reflected while listening to the valley stream. Nature was not merely a background to his scholarship.
The rocks suggested enduring principles. The flowing water revealed movement without obstruction. The trees changed with the seasons while preserving the center of life. Nature spoke constantly of order without using human language.
For Yi Eon-jeok, Dongnakdang was both a library and a philosophical classroom. Nature was the oldest teacher.
Why Nature Became the Scholar’s Teacher
Most Joseon Seowon were located where mountains and water met. This was not simply because scholars preferred beautiful scenery. For Neo-Confucian thinkers, nature was a visible expression of cosmic order. Mountains, streams, trees, stones, and the turning seasons revealed principles that human beings should learn.
The landscape surrounding Oksan Seowon and Dongnakdang is especially quiet and enclosed. A stream runs close to the buildings. Forests surround the academy. The mountain protects it from the noise of the outer world. Yet the space is not completely sealed off. The stream continues outward, and roads connect the valley to villages and society.
This resembles Yi Eon-jeok’s life. He lived in nature but did not forget the world. He studied in solitude but did not ignore the problems of the community. He cultivated his mind but did not abandon responsibility for public affairs.
To find oneself in nature is not to escape reality. It is to restore the mind before returning to the world.
The Spatial Structure of Oksan Seowon
Oksan Seowon presents the characteristic spatial order of a Joseon academy. The areas for learning stand toward the front, while the shrine occupies the rear. The lecture hall, student residences, repositories for books and printing blocks, and the shrine dedicated to Yi Eon-jeok are arranged within a unified order. This sequence represents the educational process of the Seowon.
A person enters first as a learner. He then becomes one who reflects upon himself. Finally, before the memory of a great teacher, he asks what path he should follow. Architecture became the order of education.
Oksan Seowon does not depend upon lavish ornament. Wood, earth, stone, tile, and forest exist in quiet balance. The buildings do not dominate nature. They lower themselves within it.
This reflects the Neo-Confucian view that human beings should not claim to be the absolute center of the universe. Humanity must discover its proper place within a larger natural and moral order.
Guin-dang and the Search for Humaneness
The main lecture hall of Oksan Seowon is called Guin-dang, the “Hall for Seeking Humaneness.” In Confucian thought, In, or humaneness, is the core of what it means to be truly human. It includes care for others, self-restraint, moral concern, and the capacity to live responsibly within a community. Guin-dang was therefore not simply a classroom where texts were read.
It was a place where people studied in order to become more fully human. Today, education is often understood as an expansion of capability. Students are expected to calculate more quickly, remember more information, and achieve greater results. But Guin-dang asks different questions.
As knowledge increases, does one understand others more deeply? As status rises, can one become more humble? As power grows, can one care more for the vulnerable? If knowledge does not become character, learning remains incomplete.
The educational philosophy of Oksan Seowon is condensed into the three characters of Guin-dang. The end of learning is not knowledge. It is humanity.
Yi Eon-jeok’s Philosophy and the Principle of Li
A central concept in Yi Eon-jeok’s philosophy is Li. Li refers to the universal principle and order present in all things. There is principle in the rising and setting of the sun and in the circulation of the seasons. There is also principle in the human capacity to love parents, respect others, and distinguish right from wrong.
Yet desire and emotion often obscure that principle. Yi Eon-jeok believed that learning and self-cultivation should reveal the right principle already present within the human mind. His philosophy did not separate the individual from the world. The order of the human mind and the order of the universe were connected.
When the mind became upright, conduct could become upright. When conduct became upright, family, society, and government could also move toward order. This line of thought later influenced Yi Hwang and became an important foundation of the Yeongnam intellectual tradition. Official heritage documentation likewise describes Yi Eon-jeok’s principle-centered philosophy as a precursor to the Neo-Confucian thought later developed by Yi Hwang. ([국가유산포털][2]) This is also why Yi Eon-jeok contemplated the universe within nature. The principles of nature and the principles of the human mind were not separate.
Clear water became an image of a clear mind. The steady mountain became an image of moral constancy. To observe nature was to observe oneself.
Learning That Did Not Cease in Exile
One of the most moving chapters of Yi Eon-jeok’s life was his exile. He was sent to Gangye, far from his family, students, and hometown. Yet even in isolation and hardship, he did not abandon study. There he wrote about the moral discipline and political principles that a ruler should follow. His Jinsu Palgyu, composed during exile in 1550, presented eight guidelines for the cultivation of royal virtue and responsible government. ([국가유산포털][2])
Such a work could not have been written by a man consumed only by resentment toward those who had exiled him. Yi Eon-jeok saw the future of the country as more important than his private grievance. Even in personal suffering, he hoped that the ruler and government would return to the right path. Here we see again what learning meant to the Confucian scholar.
Learning is not possible only in favorable circumstances. It is the power to preserve oneself when life does not unfold as desired. It is the ability to transform hardship into reflection rather than resentment. Yi Eon-jeok was physically confined to a remote borderland, but his thought remained directed toward the nation and its people.
The Power of Records Preserved at Oksan Seowon
Oksan Seowon has preserved not only architecture but also an important body of documentary heritage. Manuscripts in Yi Eon-jeok’s own hand, together with other scholarly texts, are regarded as major sources for studying Joseon classical learning, political philosophy, and ritual thought. These works were preserved at Oksan Seowon and Dongnakdang and have been designated as important national heritage materials. ([한국민족문화대백과사전][5]) The importance of a Seowon lies not only in its teaching of people. It also lies in its preservation of thought and memory.
The learning of one generation may disappear when its scholars die. But when writings, books, printing blocks, and documents remain, ideas can encounter later generations again. Oksan Seowon did not honor Yi Eon-jeok only through ritual. It preserved his writings, read them, and continued them as living scholarship.
Memory was not imprisoned within ceremony. It was transmitted as knowledge. This is what distinguishes a Seowon from a shrine alone. A Seowon does not stop at reverence.
It reads the teacher’s thought, questions it, interprets it anew, and keeps it alive.
Surviving the Abolition of the Seowon
By the late Joseon period, the number of Seowon had grown dramatically, and serious abuses emerged. Some academies became centers of factional or regional power rather than scholarship. Others enjoyed tax privileges and imposed burdens upon local communities. Heungseon Daewongun therefore ordered the abolition of most Seowon across the country. Many disappeared.
Oksan Seowon was among those allowed to remain, reflecting the historic authority of its scholarly tradition. ([한국민족문화대백과사전][6]) This survival shows that Oksan Seowon was not merely a local memorial academy. It had developed into an important center of Yeongnam Neo-Confucian scholarship. Even when many Seowon had become compromised by political privilege, Oksan Seowon retained sufficient intellectual and historical significance to endure.
Cultural heritage does not survive simply because it is old. It survives because later generations continue to recognize and protect its value. The history of Oksan Seowon demonstrates that preserving a place also means preserving thought and memory.
Why UNESCO Recognized Oksan Seowon
In 2019, UNESCO inscribed “Seowon, Korean Neo-Confucian Academies” as a World Heritage property because the nine academies together bear exceptional witness to Korea’s distinctive Neo-Confucian educational tradition. UNESCO emphasized three essential functions of the Seowon: learning, veneration of scholars, and interaction with the natural environment. These functions were expressed through its architecture and spatial design. ([whc.unesco.org][1]) Oksan Seowon embodies all three. The first is learning.
It was a place where Yi Eon-jeok’s thought was studied and future scholars were educated. The second is ritual veneration. It preserved the memory of the teacher and carried his moral example into later generations. The third is the relationship with nature.
Mount Jaoksan, the valley, Dongnakdang, and the academy form a unified intellectual landscape. The importance of Oksan Seowon therefore lies not only in any single building. Its surrounding environment is part of the educational space. Looking at the mountain was a form of study.
Listening to the water was part of moral cultivation. UNESCO recognized more than tiled roofs and timber frames. It recognized a cultural tradition in which humanity and nature, knowledge and life, memory and education were inseparably connected.
Solitary Joy and Responsibility to the Community
Because of the name Dongnakdang, Yi Eon-jeok’s thought may be mistaken for a philosophy of private withdrawal. His life shows otherwise. In solitude, he cultivated his mind. In public life, he used that cultivated mind for politics and community.
He studied alone not to abandon the world, but to judge the world more clearly without being swept away by its noise. Today, people are constantly connected. Through phones, the internet, and social media, we encounter endless streams of people, opinions, and information. Yet as connection increases, time spent alone with one’s own mind often decreases.
Dongnakdang speaks to this condition. Solitude is not isolation. It is the time in which we ask whether our thoughts are truly our own. It is the time in which we step beyond fashion and public approval to ask what is right.
Yet solitude becomes complete only when one returns to the community. A person who has examined himself deeply is less likely to judge others carelessly. A person who has studied his own desire is more likely to exercise power responsibly. Solitary joy is both personal freedom and the beginning of communal responsibility.
Education Today and the Question of Oksan Seowon
Modern schools transmit knowledge rapidly. Students learn many subjects and prepare for many examinations. But standing in Oksan Seowon, one is compelled to ask again: What is education for?
Is it for attaining a higher position? For acquiring greater wealth and power? Or for disciplining the mind and seeing the world more clearly? Yi Eon-jeok did not separate the inner life from political reality.
When a person with a clouded mind gains power, politics also becomes clouded. When a person unable to discipline desire possesses knowledge, that knowledge may become a weapon against others. Education must therefore cultivate more than ability. It must cultivate the character capable of deciding how that ability should be used.
This is why the name Guin-dang still matters. Education should not stop at producing competent people. It must seek to form humane people.
Reading Yi Eon-jeok Again in the Age of AI
Artificial intelligence can analyze knowledge accumulated over centuries and reconstruct it in new forms. In the future, human beings will find it increasingly difficult to prove their value merely by remembering more or calculating faster than machines. Yet Yi Eon-jeok’s idea of learning was never a competition in the quantity of information. His learning was the ability to discern principle.
Knowing what is possible is different from judging what is right. AI can present thousands of available choices. But human beings must decide which choices protect life and sustain community. AI can analyze human desire.
But it does not live the discipline of restraining that desire. AI can explain ethics. But human beings are the ones who bear ethical responsibility and accept the cost of moral action. Yi Eon-jeok’s philosophy is therefore not an obsolete doctrine in the age of AI.
It becomes a new standard. The stronger technology becomes, the deeper the human mind must become. The greater our capabilities become, the clearer our principles must become. The more abundant information becomes, the more urgently we need philosophy that asks what is fundamental.
Oksan Seowon asks about the human center before it asks about the future of knowledge.
Rethinking the Relationship Between Humanity and Nature
Modern society often views nature primarily as a resource. Mountains become land for development. Rivers become water to be utilized. Forests are measured in economic value.
Oksan Seowon presents another relationship. Nature is not simply an object to possess or control. It is a mirror in which humanity sees itself. Before the silence of the mountain, we recognize the lightness of our words.
Before the flowing stream, we examine the obstruction of our desire. Before an ancient tree, we recognize the brevity of human life. This view of nature is especially important in an age of ecological crisis. When humanity separates itself from nature, it eventually destroys the very ground of its own existence.
The universal principle sought by Yi Eon-jeok was not an order designed for humanity alone. All things are connected, and harmony emerges when each remains true to its proper place. Oksan Seowon is therefore not only a philosophical space of the past. It can also become a place of ecological education for the future.
Laws and economics alone cannot fully explain why nature must be protected. A living attitude of respect for nature must also arise within the human heart.
Leaving Oksan Seowon
What remains longest after leaving Oksan Seowon is not the size of its buildings. It is the sound of the stream. That water must also have flowed in Yi Eon-jeok’s time. It flowed when he returned home after political defeat.
It flowed when he read in Dongnakdang. It flowed when later scholars built the academy in his memory. People depart and eras change, but water continues to move. Yet movement does not mean forgetting everything.
Water passes, but it leaves a path. The life of Yi Eon-jeok was like that. He stood near the center of power but did not surrender himself to power. He withdrew to his native valley but did not turn away from reality.
He was confined in exile, but his thought was never imprisoned. He found joy in solitude within nature, but the final direction of his learning was always toward the country and its people. Oksan Seowon asks us: What do I think about when I am alone?
Does the knowledge I acquire make my mind clearer? Do I merely follow the current of the world, or do I possess principles that must be preserved within that current? Finding oneself in nature may not mean gaining a dramatic revelation. It may simply mean laying down the noise of the mind and asking again, before mountains and water that have long remained in place, what kind of person one has become.
At Oksan Seowon, not only Yi Eon-jeok’s writings and philosophy remain. A silence remains in which people of the present may pause and examine themselves. Within that silence, we discover a lasting truth: To understand the foundation of the world, one must first examine the mind.
And only one who studies himself deeply can serve the world rightly.
Preview of Part 6
Dodong Seowon
Kim Goeng-pil and the Path of Moral Learning
If Oksan Seowon is the place of a philosopher who explored the principles of the universe and the human mind within nature, Dodong Seowon is the place of a scholar who was willing to risk his life to preserve learning as a moral way of life. Our next journey takes us to the banks of the Nakdong River in Dalseong, Daegu, where we will encounter Hanhwondang Kim Goeng-pil. As the teacher of Jo Gwang-jo and a foundational figure in the moral tradition of Joseon’s Sarim scholars, why did Kim Goeng-pil devote his life to the elementary Confucian text Sohak? What was the path of moral learning that he refused to abandon amid the violent political storms of the Literati Purges?
At Dodong Seowon, we will ask again: What does it mean to hold what one has learned more precious than life itself?
[1]: https://whc.unesco.org/en/
[3]: https://www.heritage.go.kr/
About the Author
Jung Yeon-tae, who writes under the pen name Manri Pungchwi, is a cultural thinker and policy strategist. His research and writing connect history, philosophy, science, and technology, interpreting Korea's traditional culture as a source of future value in an era of civilizational change and artificial intelligence.
