That is an excellent and profound question that gets to the very heart of the philosophy in the Yoga Sutras.
First, a small but important clarification: the term is gunas (गुण), not "guns." It's a common phonetic confusion.
What Are the Gunas in Patanjali's Yoga Sutras?
In the Yogic philosophy of Patanjali, the entire universe of matter, energy, and mind—everything that is not pure consciousness—is called Prakriti. The three fundamental forces or qualities that constitute all of Prakriti are the gunas.
They are not "things" but rather essential strands of energy or tendencies that are woven together to form everything we experience in the material world, from a rock to a star to our own thoughts and emotions.
The three gunas are:
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Tamas (तमस्) – The Force of Inertia & Darkness
- Nature: Heaviness, stability, ignorance, dullness, and resistance.
- When Dominant: It manifests as laziness, procrastination, confusion, depression, deep sleep, and a lack of clarity. It is the force of "not-doing" and "not-knowing."
- Example: A muddy, stagnant pool of water. It's heavy, unmoving, and you can't see through it.
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Rajas (रजस्) – The Force of Activity & Passion
- Nature: Motion, energy, passion, ambition, desire, and restlessness.
- When Dominant: It manifests as a busy mind, intense emotions like anger or excitement, goal-oriented ambition, anxiety, and constant movement. It is the force of "doing" and "wanting."
- Example: A turbulent, churning river. It is full of energy and motion, but it's agitated and unclear.
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Sattva (सत्त्व) – The Force of Harmony & Clarity
- Nature: Purity, balance, clarity, peace, and wisdom.
- When Dominant: It manifests as a feeling of calm, contentment, compassion, joy, focused intelligence, and a state of "flow." It is the force of "being" and "knowing."
- Example: A clear, calm lake. It is still and peaceful, and you can see all the way to the bottom.
The Crucial Point: The gunas are not "good" or "bad." They are fundamental cosmic forces. Our minds, bodies, and the world are in a constant state of flux as the gunas interact and shift their dominance. The goal of yoga is not to destroy tamas and rajas to become only sattvic, but to understand and transcend all three. As Patanjali says in Sutra 2.18, the entire world of the gunas exists for two reasons: experience (bhoga) and liberation (apavarga).
How Do They "Stop Their Work"?
This is the ultimate goal of Yoga and is the theme of the final chapter of the Yoga Sutras (Chapter 4: Kaivalya Pada). The gunas don't "stop" by being annihilated. There is no cosmic battle. They stop their work when their purpose is fulfilled.
Their "work" is to create the entire show of life for the Purusha—the pure, unchanging Witness Consciousness, the True Self. The Purusha mistakenly identifies with the dancing patterns of the gunas (i.e., our body, thoughts, and personality) and thinks, "This is me." This is the root of all suffering (samskara).
The gunas "stop their work" when the Purusha realizes its true nature as separate from Prakriti.
The Process of Stopping the Gunas' Work:
1. The Shift from Tamas/Rajas to Sattva:
The initial stages of yoga practice (Abhyasa or practice and Vairagya or detachment) are designed to calm the turbulent, agitated energy of Rajas and dissolve the dullness of Tamas. Through ethical living, postures, breathwork, and meditation, the mind becomes more stable, clear, and harmonious—it becomes predominantly Sattvic.
A Sattvic mind is a necessary tool, like a clean lens, but it is still part of Prakriti. It is still a trap.
2. The Key Discrimination (Viveka-Khyati):
With a Sattvic mind, the practitioner develops the power of discernment. They can finally see clearly and distinguish the difference between:
- Purusha: The silent, unmoving Witness (the Seer).
- Prakriti: The ever-changing "seen" (the mind, body, thoughts, emotions—the entire play of the gunas).
This is the moment of enlightenment. You realize, "I am not the thoughts. I am not the emotion. I am not the body. I am the silent, still awareness that is aware of all of this."
3. Non-Attachment to Sattva Itself:
This is the final, subtle step. Even the bliss, peace, and wisdom of a Sattvic state are incredibly pleasant. The temptation is to cling to this state. But the liberated yogi realizes that even this sattvic "joy" is a subtle object of awareness—it is still part of Prakriti. By letting go of attachment to Sattva itself, the yogi severs the final link.
4. The Resolution of the Gunas (Kaivalya):
Patanjali describes this final moment beautifully in Sutra 4.34:
"Kaivalya is the firm establishment in the nature of the Purusha. The gunas, having fulfilled their purpose of providing experience for the Purusha, resolve back into their unmanifested state."
When the Purusha no longer identifies with the "show" put on by the gunas, the show ceases to have a purpose. The forces of projection (Tamas), activation (Rajas), and illumination (Sattva) withdraw. The rope of Prakriti, composed of the three strands of the gunas, untwists and dissolves.
An Analogy: The Movie Projector
Imagine Purusha is the person sitting in a theater seat.
Imagine Prakriti (the Gunas) is the movie projector and the film on the screen.
- Tamas is the celluloid film itself—it's the potential, the material substance.
- Rajas is the spinning of the film reel and the glowing lamp—the activity and energy.
- Sattva is the clear light and image projected onto the screen—the experience and knowledge.
The person (Purusha) gets so engrossed in the movie that they forget they are sitting in a chair. They laugh, they cry, they identify completely with the characters and story on the screen. They think, "I am the hero!"
How do the gunas "stop their work"?
The person (Purusha) suddenly realizes, "Wait a minute... this is just a movie. I am the one watching the movie."
At that moment of recognition, the movie doesn't fall apart. But the person's relationship to it is transformed forever. They are no longer entangled in its drama. If they then completely lose interest in the movie (Vairagya), and its purpose for them is over, they get up and walk out of the theater. The projector keeps spinning, but for that liberated person, the "work" of the gunas has ceased.
This is Kaivalya: the liberation of Purusha from its false identification with Prakriti.