What Is the “Sankhya Philosophy” at the Foundation of Ayurveda? A Gentle Explanation of Triguna and the Five Elements

1. It’s not difficult because you lack knowledge

One reason Ayurveda can feel difficult is not just because of the unfamiliar terms. There is a more fundamental difference in how we view things.

Science zooms in, while philosophy zooms out

It may be easier to understand if you think of camera lenses. The science we are familiar with in our daily lives is like a microscope lens. It zooms in closely on each cell and molecule, trying to understand the whole by examining the parts in detail.

Ayurveda, on the other hand, takes a view closer to a wide-angle lens. It zooms out to capture how everything is connected and how it moves. Because we are accustomed to understanding things by breaking them down into small parts, this “big-picture” perspective can feel unfamiliar and elusive.

Doshas are “concepts,” not “substances”

There is another point where people often stumble. Doshas such as Vata and Pitta do not refer to specific organs or fluids located somewhere in the body.

If you had to compare them to something, they are closer to software functions running in the background of a smartphone. You cannot see them or pull them out to show someone, yet they are certainly at work—that is how we understand them. Asking “Where is Pitta located?” is somewhat similar to asking “Where is the calculation function located in the smartphone?”

It starts with the universe, even though it’s about the body

This brings us to the main topic of this article. Explanations of Ayurveda often begin with the origin of the universe or the elements. Many people want to learn about health and find this approach roundabout, so they stop reading here.

However, this is not a roundabout way; it is the correct order. We will look at the reason in the next section.

2. Samkhya philosophy: the starting point of everything

At the root of Ayurveda lies Samkhya philosophy, which originated in ancient India. Its name comes from a Sanskrit word meaning “to count,” and it is translated into Chinese as “numerical theory.” It was a theory that attempted to count, classify, and systematically explain every phenomenon occurring in the natural world.

The source of Indian thought

Samkhya philosophy is considered the source of various Indian schools of thought. Both Ayurveda and yoga are built upon this common framework. The reason the ideas discussed in yoga and Ayurveda sound similar is that they both originated from the same foundation.

This is the first important point. Ayurveda did not emerge independently as a “health system for the body.” First, there was a grand theory explaining how the natural world is structured, and Ayurveda is a medical system that resulted from applying that theory to the human body.

This is why the universe and the elements come up even when discussing the body. It may seem like the order is backward and cause confusion, but in reality, the theory of the natural world came first, and the human body is explained as a part of it—understanding this makes the flow of the discussion clear. In India, the universe is often called the macrocosm and the human body the microcosm because the same principles apply to both.

Purusha and Prakriti—two principles

Samkhya philosophy posits two principles that make up the world.

• Purusha (pure consciousness): the formless blueprint of the universe itself.
• Prakriti (primordial matter): the substance that unfolds according to that blueprint.

From Prakriti, minute things such as subatomic particles and atoms are born, and eventually, objects, living beings, and the entire universe take shape. Samkhya philosophy viewed the natural world as this kind of hierarchical expansion.

And what is said to govern this unfolding are the Triguna and the five elements, which we will examine next. These two form the foundation for understanding Ayurveda and, more broadly, Eastern thought.

3. Triguna—all phenomena are combinations of three states

Samkhya philosophy holds that every phenomenon occurring in the natural world can be broken down into combinations of three states. This is called Triguna (the three Gunas, or qualities). The three are Sattva, Rajas, and Tamas.

In older texts, they have been translated as pure, active, and inert qualities, respectively. However, simply looking at these translations does not make them very clear. It becomes much clearer when you consider what actually happens when two things meet—that is, what these three really refer to.

Spreading out, resonating, and pulling together to solidify. These are the three. Everything occurring in the natural world can be broken down into one of these three elements or a combination of them—that is the core of the Triguna concept.

In fact, this idea of “breaking things down into three” is not particularly unusual. For example, when explaining chemical reactions, we also organize phenomena by their functions, such as “materials change,” “energy is produced,” and “new things are created.” Consider the movement of matter as well. An object moves in a certain direction with speed and mass. Triguna may be an unfamiliar term, but its underlying framework is actually quite familiar.

4. The five elements—“fire” and “wind” are not real fire and wind

The five elements always appear in explanations of Ayurveda. They refer to space, wind, fire, water, and earth. This is where many people become confused, asking, “What does it mean to have fire inside the body?”

However, they do not refer to the actual fire and wind of the natural world. It becomes much easier to understand if you think of them as five classifications of the properties and functions that matter possesses.

In Ayurveda, each element is defined by two aspects: Guna (quality) and Karma (function).

When laid out this way, they can be understood not as mystical concepts, but as a system of classification. “Fire” does not refer to a burning flame, but to the function of transforming something into something else. When food eaten by the body turns into energy—that is the function of “fire” in this sense.

This is not that different from how we classify matter as “gas, liquid, and solid.” It is simply a system that uses five categories and defines them by both their qualities and functions.

In Samkhya theory, the five elements are also viewed as the five forces that form the natural world. Modern physics has identified only four forces. Very recently, a new idea has emerged suggesting that a fifth force is involved in the formation of dark matter, which makes up most of the universe. Samkhya philosophy is ahead of modern physics

5. From the foundation to the “tridosha”

By now, the two foundations have been laid out. Triguna, which views all phenomena as combinations of three states, and the five elements, which classify the properties and functions of matter into five categories. Ayurveda applies this framework of the natural world directly to life.

The idea of the “triguna of life”

The sages of Siddha medicine, the precursor to Ayurveda, were deeply familiar with Samkhya philosophy. They believed that if Triguna is involved in every phenomenon in the natural world, there must be the same three in the functions of life. This is how the “triguna of life” was conceived.

Initially, it was expressed as three things: something like wind (Vadam), something like bile (Pitam), and something like mucus (Kapam). Ayurveda inherited this idea and renamed them Vata, Pitta, and Kapha. This is the tridosha.

The original meaning of “dosha”

Here is a point that may come as a surprise. The word dosha originally meant “impurity that causes disease.”

In Japanese explanations, it is often described as “biological energy (something like qi in Chinese medicine),” but tracing its etymology reveals that it was originally understood as something that causes ill health when disturbed. The tridosha theory has been used for so long because it was a tool for diagnosing and treating diseases, and this etymology reflects its origins well.

The description of “three energies” is not accurate

There is another common explanation worth mentioning. Western textbooks sometimes introduce the tridosha as energies, such as “kinetic, chemical, and potential energy.”

However, this is not accurate. Energy is a physical quantity, while doshas refer to the functions of life. They are fundamentally different concepts and cannot be substituted for one another. It is more accurate to view doshas not as “mystical forces flowing through the body,” but as a framework for classifying and explaining the functions of life.

Triguna and tridosha do not correspond one-to-one

They are sometimes explained as having a neat correspondence, such as “Vata corresponds to Rajas, and Kapha corresponds to Tamas.” However, in reality, it is not that simple.

Each of the tridoshas is considered to contain the three elements of Triguna in certain proportions. Rather than a three-by-three correspondence table, it is more accurate to view them as combinations of three components.

Furthermore, several theories have long been proposed about how to combine the five elements to correspond to the tridosha. Explanations vary on whether to add “space” to Vata or “water” to Pitta, and they are not always consistent. Some point out that it is inherently difficult to reorganize the five elements, which originally function together as a set, into three categories. While classical explanations are intuitive and easy to understand, they also contain such ambiguities—knowing this should help explain why different guides say different things.

6. Summary

The reason Ayurveda can feel difficult was not the amount of knowledge, but the difference in perspective. It can be summarized as follows:

Once this foundation is visible, the core of Ayurveda—Vata, Pitta, and Kapha—the tridosha—also becomes much easier to understand.

Next, in What Are Vata, Pitta, and Kapha? Understanding the Ayurvedic “Tridosha Theory” Through Modern Science, we will take a closer look at the three functions themselves.