The Evolution of Ayurveda- Lecture Notes by Dr P Ram Manohar

Ayurveda, derived from the Sanskrit words Ayush (life) and Veda (knowledge), translates to the “knowledge of life.”

This ancient system of medicine has been evolving for thousands of years. It has been shaped by the contributions of countless teachers and scholars. Its earliest texts were not only well-developed but also highly systematized, laying a strong foundation for medical practice in India.

Over the centuries, Ayurveda has adapted to changing times while maintaining its core principles of holistic healing. India holds one of the richest collections of medical manuscripts. These collections preserve the wisdom of Ayurveda. They ensure its continued relevance in modern healthcare.

Foundational Text in Ayurveda

Ayurveda’s rich literary tradition is marked by several foundational texts that have shaped its practice over centuries. The Charaka Samhita focuses on general medicine, while the Sushruta Samhita is renowned for its detailed knowledge of surgery.

The Ashtanga Sangraha systematizes Ayurveda into eight clinical specialties, providing a comprehensive approach to medical treatment. Other significant works include the Kashyapa Samhita, which specializes in pediatrics, and the Bhela Samhita, which also addresses general medicine. The Harita Samhita, originally from this period, was later rewritten. Later texts like the Laghutrayi refined Ayurvedic knowledge. They expanded its scope, ensuring its evolution and relevance across generations.

Evolution of Ayurveda

The evolution of Ayurvedic literature includes a diverse range of texts, each specializing in different aspects of medical science. The Madhava Nidana focuses on diagnostics. The Sarngadhara Samhita deals with pharmacy and pharmaceuticals. The Bhava Prakash serves as an extensive pharmacopoeia. It details various medicinal substances.

Other significant texts, such as Siddhayoga, Gadanigraha, Nighantu, Rajanighantu, and Kayyadeva Nighantu, further enriched Ayurvedic knowledge. The codification of these writings followed specific guidelines. This method, known as Tantrayukti, ensured a structured approach to medical documentation.

Ayurvedic Samhitas adhered to diverse structures, with the Charaka Samhita notably undergoing a peer review process before publication.

Criteria for accepting the work of Ayurveda

The first criterion for accepting a textbook was peer approval, emphasizing the importance of scholarly validation. This structured approach to writing includes an introduction, methods, and discussion. It aligns closely with the modern research paper format. It highlights Ayurveda’s long-standing commitment to academic rigor.

Ayurveda historically developed specialized schools of practice, reflecting a deep understanding of medical science. The Dhanvantariya Sampradaya focused on surgery, making it the surgical school. The Atreya Sampradaya concentrated on general medicine. It formed the medical school. Specialization was integral to Ayurveda, with practitioners referring cases to surgeons when medicinal treatments proved ineffective.

Some fields of expertise were specific, like Arbhudayana (cancer treatment), as mentioned in the Sushruta Samhita. Tadvidya denoted mastery in particular medical areas. While Ayurveda was once highly specialized, it has now become more generalized in practice.

Influential contributors of Ayurveda

Some of its most influential contributors include Charaka, Sushruta, Vagbhata, Madhava, Sarngadhara, Bhavamishra, Sodhala, Madanapala, and Basavaraja. Additionally, notable commentators such as Chakrapani, Dalhana, Arunadatta, Jejjata, and Indu played a crucial role in interpreting Ayurvedic knowledge. They expanded it, ensuring its continued relevance and evolution.

Ayurveda teaches that the pursuit of knowledge requires a comprehensive engagement with the world. It urges one to be present everywhere. One should learn from every possible source. This holistic approach is exemplified by figures such as Sushruta. He is renowned for his attentive listening skills. Vagbhata is celebrated for his ability to express and present complex ideas clearly.

Nature as the first teacher in Ayurveda

The tradition emphasizes that nature itself is the first teacher. It originates from the divine principles of Brahman and Prajapati Mishra. Wisdom is intrinsically linked to the natural world. Scholars like Bharadwaja pioneered Ayurveda. Its emergence from Indra symbolizes an invitation to expand one’s capabilities. It encourages constant evolution by embracing broader and more profound insights.

Aspect	Representative/Source	Key Idea
Listening	Sushruta	Emphasizes active, attentive listening to gather wisdom.
Presentation	Vagbhata	Highlights the importance of clear expression and effective communication.
Knowledge Expansion	Nature/Indra	Encourages learning from nature and continuously expanding one’s capabilities.

Ayurvedic texts have undergone continuous modifications over time, adapting to new insights while preserving core principles. The process of knowledge transmission in Ayurveda involves two key stages. Avabodha is the receiving of knowledge. Upadesa is the transfer of knowledge.

The first major textbook of Ayurveda, the Charaka Samhita, began as student notes. It was not a formal treatise. Atreya, a renowned teacher, imparted his teachings to Agnivesha, who meticulously documented what he learned.

This work was initially known as Agnivesha Samhita. Its name reflected its original authorship. Later, it was further refined and expanded into the Charaka Samhita. This tradition of learning and evolving texts highlights the dynamic nature of Ayurvedic knowledge.

In the great epics Ramayana and Mahabharata, symbolic interpretation plays a vital role. This concept resonates within the Ayurvedic tradition as well. Teachers like Agnivesha are renowned for his higher knowledge. They underscore a student-centric approach to learning. A student’s ability to record and express insights correctly serves as proof of effective education.

Focus of Ayurveda to active participation

Ayurveda has always been dedicated to empowering its students, encouraging active participation and meticulous documentation as key components of learning. An illustrative example is the Kasyapa Samhita, known as the pediatric school of Ayurveda. According to tradition, young scholars wrote this text. It is also referred to as Vrddhajivakatantra and is attributed to the disciple of Ashyapa. This rich legacy highlights the enduring commitment to student empowerment and the symbolic depth of knowledge in Ayurveda.

Atreya, one of the most influential teachers in Ayurveda, had several disciples who contributed significantly to Ayurvedic literature. Agnivesha, his most prominent student, compiled the Agnivesha Samhita, which later evolved into the Charaka Samhita. Another disciple, Bhela, authored the Bhela Samhita, incorporating many of Agnivesha’s contributions.

Other students, such as Jatukarna and Parasara, also produced works, but their texts are not available today. Similarly, Harita’s original work has been lost, though a later reconstruction was attempted. These disciples played a crucial role in preserving Ayurvedic knowledge. They also helped in expanding it. However, some of their contributions have been lost over time.

Ayurvedic codic Language and Evolution

Charak samhita says that many contributions are available in the world.  In Ayurvedic codic language, terms evolved over time, such as “Bhela” becoming “Vela” in the Charaka Samhita. Recently, 9% of this codic language has been deciphered, shedding new light on Ayurvedic texts.

Ayurveda is traditionally divided into eight branches. These include general medicine, surgery, pediatrics, ENT, dentistry, ophthalmology, psychiatry, toxicology, rejuvenation medicine, and reproductive medicine.

Advance Practice in Ayurveda

Sushruta, known as the father of surgery, used alcohol as an anesthetic before performing surgeries. He developed Sammohan Churna for anesthesia. Vagbhata, another prominent scholar, made significant contributions to Ayurveda, integrating earlier knowledge and refining medical practices. These advancements highlight the depth of Ayurvedic wisdom, which continues to influence medical sciences today.

Importance of students in learning Ayurveda

The Charaka Samhita shares knowledge in discussions and notes. It does not use structured texts. This method emphasizes the importance of student participation. Unlike modern classrooms where teachers initiate the lessons, in Charaka Samhita, learning begins with students asking questions. If students do not question, there is no teaching.

This approach fosters deep inquiry and critical thinking, ensuring that knowledge is not just transmitted but actively explored. The text highlights the importance of debate. It encourages students to engage in discussions. They learn to accept differing viewpoints and develop a refined understanding through dialogue.

Local Ayurvedic Practices

Terminology plays a crucial role in ensuring clarity and consensus in these debates. Additionally, regional traditions influence Ayurvedic practices, with diverse climates and local applications shaping treatments. For instance, Kerala has developed specialized Ayurvedic traditions that cater to its unique environment.

Ayurveda is deeply rooted in ancient wisdom yet remains dynamic, integrating insights from various scholars. Thinkers like Patanjali, Chakrapani, Dalhana, and Arundatta have expanded and refined Ayurvedic thought. Theories of nutrition provide various views on nutrient absorption. Kedarikulya, or nutrition through irrigation channels, and Khale Kapota, or selective nourishment, are examples of these perspectives.

The concept of bhuta as savisakrimi introduced the idea of microscopic organisms long before modern microbiology. It recognized the existence of invisible life forms affecting health. Such insights demonstrate Ayurveda’s depth and its continuous evolution in response to new understandings. By embracing diverse traditions and scientific advancements, Ayurveda remains a comprehensive and adaptable system of medicine.

Ayurveda- A structured approach to knowledge

Ayurveda is not just a system of medicine. It is also a structured approach to knowledge. It encompasses diagnostics, lexicography, and methods of learning. Madhava was a pioneer in diagnostics. He contributed significantly to the understanding of diseases. Bhava Mishra played a key role as a lexicographer. He refined Ayurvedic terminology and classifications.

The tradition of Ayurveda offers lessons in diagnosing and treating ailments. It also teaches how to structure textbooks and engage in debates. Furthermore, it helps refine knowledge through dialogue. By studying Ayurveda, one learns the art of critical thinking. It teaches structured reasoning and scientific discourse. These essential skills extend beyond medicine into philosophy and pedagogy.

Ayurveda also explores the profound relationship between the microcosm and macrocosm. It recognizes the body as a dynamic system of dancing subatomic particles. The body contains countless microscopic units of life. Ayurvedic thought acknowledged concepts such as genetic transmission of diseases long before modern science did. It also recognized the presence of invisible microbes. Additionally, it understood the significance of gut flora.

Ayurveda- An Earliest Medical System

The idea of aparisankheya—innumerable natural organisms—reflects an early understanding of microbiology. Ayurveda was one of the earliest medical systems to shift from prognosis to diagnosis. It laid the foundation for systematic medical inquiry. This holistic perspective continues to inspire modern scientific exploration, bridging ancient wisdom with contemporary medical advancements.

In Ayurveda, identifying the causes of diseases is based on lingas (symptoms or signs), which serve as indicators for diagnosis. Respiration is a vital process. The body expels toxins and absorbs the life-giving essence from the air. Oxygen is likened to nectar. This perspective highlights the purifying and nourishing role of breathing in maintaining health.

Bhela, an ancient scholar, described the circulation of blood. He noted that the blood expelled from the heart returns through the veins. This concept aligns with modern understanding of the circulatory system. The mind, according to Ayurvedic thought, is situated between the eyes and the head. Today, we recognize that when light falls on the eye, it stimulates the visual cortex, enabling us to perceive images. Such insights reflect Ayurveda’s deep observational wisdom.

Importance of truth and logic in Ayurveda

Vagbhata emphasized the importance of truth and logic in knowledge acquisition. He stated that even if a valid statement is made by a child or a Brahmana, it must be accepted. This is an enduring principle that encourages open-mindedness and rational inquiry in learning.

Ayurveda is a continuously evolving system, adapting to the needs of different eras—yuganurupa sandarbha. Throughout history, numerous modifications and refinements have taken place, reflecting Ayurveda’s dynamic nature. The status of Rishis (sages) was examined critically. This demonstrates that questioning authority was an integral part of Ayurvedic tradition. This openness to upgrades and modifications ensures that Ayurveda remains relevant and effective.

Agnivesha, one of the foremost disciples of Atreya, critically examined the utility of treatments and diet. He questioned why some individuals who followed Ayurvedic guidelines still succumbed to disease. Meanwhile, others who did not adhere to them survived. Such inquiries highlight Ayurveda’s commitment to evidence-based reasoning rather than blind adherence to tradition.

A true physician, according to Ayurveda, understands both the how and why behind the success of medical procedures. The Charaka Samhita explicitly acknowledges that no treatment is entirely free from side effects. It emphasizes the importance of assessing the risk-benefit ratio before recommending any intervention. If the benefits outweigh the risks, then the treatment is justified.

This principle remains central to medical decision-making even today. Furthermore, Ayurveda advocates for a holistic approach, emphasizing that isolated treatments may not yield optimal results. Only when therapies, diets, and lifestyle modifications are applied as a whole can their full benefits be realized. This comprehensive approach reinforces Ayurveda’s core philosophy that health is best maintained through balance and integration rather than fragmented interventions.

Ayurveda- A holistic approach to health

Ayurveda takes a holistic approach to health, far beyond the isolated effects of individual nutrients. Some may claim that Chyawanprash is merely a source of vitamin C. However, this does not mean we should limit ourselves to consuming only vitamin C. Instead, it highlights that Ayurveda offers a much broader and integrative perspective on well-being. It views the body, mind, and soul as an interconnected whole, whereas modern medicine primarily focuses on analyzing individual parts.

One key distinction between the two systems is their approach to learning. Modern medicine often studies the human body through dissections of the dead. In contrast, Ayurveda emphasizes understanding life through the study of the living.

Relationship between Ayurveda & Modern science

The relationship between Ayurveda and modern medicine can be understood through the framework of Tatva. It can also be understood through Shastra and Vyavahara. This is a meta-framework for studying the whole. Ayurveda aligns with the idea that “the whole is greater than the sum of its parts.” It recognizes emergent properties that arise from complex interactions rather than isolated elements. It focuses on relationships, patterns, and non-linear dynamics, moving beyond rigid, reductionist models.

Additionally, there is a paradigm shift from studying averages to understanding variability. It acknowledges that health and disease manifest uniquely in each individual. This systems-based approach offers deeper insights into personalized medicine, making Ayurveda a valuable complement to modern medical advancements.

Ayurveda brings a holistic approach by integrating nature, lifestyle, and personalized care. It is both nature-centered and person-centered, focusing on harmony between individuals and their environment. Ayurveda promotes mind-body balance, using complex formulations from herbal, animal, and chemical sources to support health naturally.

Beyond treatment, Ayurveda emphasizes preventive and predictive medicine, ensuring long-term well-being and healthy aging. It teaches that living in Dharma affects personal health. It also impacts the land, time, and society as a whole. Ayurveda considers knowledge as the best medicine, with Dharma being the key to sustainable and balanced living.

Ayurveda views sustainability as Dharma, emphasizing that true well-being comes from living in harmony with nature and ethical principles. Dharma itself means sustainability, guiding balanced living for individuals and society.

Since each person is unique, Ayurveda personalizes treatment based on place, time, gender, and climate. It recognizes that external factors influence health, so therapies must be adapted accordingly. Ayurveda is a holistic integration of science, food, and medicine, ensuring a natural and balanced approach to healing and wellness.

Ayurveda emphasizes that medicine should be the last resort. It focuses first on diet and lifestyle changes to prevent illness. These changes also help to cure illness. Unlike modern medicine, which often leads to dependency and side effects, Ayurveda promotes natural healing and balanced treatments. Over time, many traditional healing systems were replaced, making people reliant on medications. However, by making simple lifestyle and dietary adjustments, we can significantly reduce the need for medicines and their potential risks. Ayurvedic formulations act like a balanced cocktail, supporting the body’s natural equilibrium and offering healthier choices for long-term well-being.

Ayurveda also teaches us to prevent suffering before it arises. The leading causes of death today—cancer, heart disease, and medical errors—highlight the need for a more holistic approach. Ayurveda sees death as a natural transition, just as sunset is as beautiful as sunrise. It values healthy aging, recognizing that elders are the spiritual, mental, and physical pillars of society. Successful aging means maintaining independence and well-being at all levels. In this way, Ayurveda remains relevant in modern times, helping people lead healthier, more fulfilling lives.

Ayurveda distinguishes between lifespan, health span, and wellness span. Lifespan refers to living a long life, while health span focuses on living disease-free and actively. Beyond that, wellness span ensures a life of balance, happiness, and fulfillment.

More than just medicine, Ayurveda is a path of transformation and self-actualization, guiding individuals toward holistic well-being. By integrating mind, body, and lifestyle, it helps maintain health naturally, promoting a life of vitality and purpose.

Note: This is a Lecture notes delivered by Dr. P. Ram Manohar. Director, Centre for Advanced Research In Ayurveda (ACARA), Amritapuri

Cite: Manohar, R. (2025, February 7). Ayurveda: Evolution and relevance for health and well-being. ASSCS Faculty Development Program Series.