The Saint-Scientist Vallalar has a precise answer for what you came here for, which is why do yogis live so long. Below, you will find the three stages of bodily transformation Vallalar taught, explaining how a life of compassion and specific diet can reverse the process of decay. Itβs a claim that sounds extraordinary, but the evidence he left behind is just as remarkable. Much writing on longevity focuses on diet or meditation alone, but Vallalar presented a complete science where the body itself becomes a vessel of light. To understand his answer, we first need to look at the man himself.
The Life and Teachings of Vallalar

Ramalinga Swamigal, known as Vallalar, was a 19th-century Tamil mystic whose collected writings, the Thiru Arutpa, remain one of the most extraordinary spiritual records ever produced. His life was filled with remarkable feats β though he dismissed anything supernatural, insisting that everything he did was a science. Vallalarβs central teaching was the Suddha Sanmarkkam, or the βTrue Path,β which is founded on Jeeva Karunyam β boundless compassion for all living beings. On January 30, 1874, accounts from those present record that he locked himself in a room in Mettukuppam and was never seen again β his body never found. This event is documented by government records and by British Collector John Henry Garstin.
The Foundation: Why Compassion Is a Physical Practice
For Vallalar, longevity was not the primary goal but a natural consequence of a much deeper transformation. The entire process begins with a single, non-negotiable principle: Jeeva Karunyam, or active compassion.
This is not a sentimental or abstract idea. Vallalar taught that every time we cause or consume the suffering of another being, particularly through eating meat, we absorb the βsignatureβ of its fear and pain into our own cells. This cellular memory of violence acts as a fundamental barrier to physical and spiritual evolution. It anchors the body to the cycle of decay and death.
A plant-based diet, therefore, is not merely a health choice but a spiritual necessity. By refusing to participate in the suffering of animals, we begin to purify the body at its most basic level. This act of compassion clears the way for the divine grace-light, Arut Perum Jyothi, to begin its work. Vallalar taught that none of the advanced techniques for body transformation can take root without Jeeva Karunyam.
The Three Stages of the Deathless Body
Vallalar documented a three-stage process of physical transmutation. He described these not as miracles, but as a predictable, scientific progression available to anyone who follows the path of compassion and grace.
Suddha Deham β The Pure Body
The first stage, Suddha Deham, is achieved through consistent practice of Jeeva Karunyam and a sattvic, plant-based diet as detailed in his text Nithya Karma Vidhi. In this stage, the physical body becomes exceptionally pure and resilient. The aging process slows dramatically, and the body becomes immune to common diseases. Those who achieve this state report a feeling of physical lightness and clarity. It is the purification of the gross, material body, preparing it to hold a higher frequency of light.
As the practitionerβs compassion deepens and their devotion to Arut Perum Jyothi intensifies, the Suddha Deham evolves into the Pranava Deham. Here, the physical form becomes subtle and radiant. The body is no longer sustained primarily by food but by the direct intake of divine grace-light. It is during this stage that physical de-aging is said to occur. Witnesses who knew Vallalar personally documented that in his later years, the wrinkles on his face vanished and his skin took on a youthful glow. His body became so subtle that it reportedly cast no shadow. The central practice for invoking this grace is the recitation of the Mahamantra:
AruαΉ Perum JΕti β AruαΉ Perum JΕti β TaαΉi Perum KaruαΉai β AruαΉ Perum JΕti
This translates to βThe Vast Grace-Light. The Vast Grace-Light. The Incomparable Great Compassion. The Vast Grace-Light.β
Gnana Deham β The Wisdom Body
The final stage, the Gnana Deham, is the complete transmutation of the physical body into pure light. This is the state Vallalar is said to have achieved before his final disappearance. The body is no longer physical in any conventional sense but has become a permanent, deathless vehicle of pure consciousness and grace. This concept finds parallels in other traditions, such as the Tibetan Rainbow Body, but Vallalarβs account is unique in its detailed, scientific framing. He presented it not as a posthumous miracle but as a living, physiological process that culminated in his conscious merging with the Vast Grace-Light.
A Direct Answer for why do yogis live so long
So, why do yogis live so long? According to Vallalar, they donβt just live longer β they progressively overcome the very mechanism of physical decay. Their longevity is not an accident of good genetics or a simple diet. It is the result of a systematic, spiritual science.
The yogiβs work is to replace the coarse elements of the bodyβbuilt from food that carries a history of sufferingβwith the subtle energy of compassion and divine light. Each act of kindness, each meal chosen to prevent harm, is a step in this alchemical process. The body stops fighting a losing battle against time and instead begins to align with a timeless, regenerative force.
A person following this path might, after months of a compassionate plant-based diet and mantra practice, notice that chronic inflammation has subsided or that their energy levels feel consistently high without stimulants. Vallalarβs teaching suggests this is not just a health benefit but the first sign that the body is beginning to change its core relationship with decay.
The extraordinary lifespan is simply evidence that the transformation is underway. The body becomes lighter, purer, and more radiant because it is slowly being rebuilt, cell by cell, with the substance of grace itself.
Start with a Single, Compassionate Meal
The path to a deathless body is long, but the first step is simple and concrete. It begins with what is on your plate.
Replace one animal-based meal today with a plant-based option from Vallalarβs Nithya Karma Vidhi: rice, lentils, greens, or stem vegetables like drumstick (moringa) or brinjal (eggplant). This is not just about nutrition. It is a conscious act of Jeeva Karunyam, a declaration that you will no longer build your body from the suffering of other beings. This single act is the foundation of everything else.
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