What is So Hum Meditation?
So Hum is a Sanskrit mantra literally meaning “That (is) I,” commonly translated as “I am That.” It is a universal and natural mantra because it is present within everybody as the breath, with the sound of “so” during inhalation and “ham” during exhalation. So Hum meditation is a practice in which the meditator mentally repeats this mantra in synchrony with the breath, without vocalization. The “That” to which the mantra refers is understood in Vedic philosophy to signify Brahman—the absolute, unchanging reality underlying all existence. In Vedic philosophy, Soham means identifying oneself with Brahman. The practice is considered ajapa japa, or “non-repeating repetition,” because the breath itself performs the mantra continuously without conscious effort.
Origins & Lineage
The first mention of So Hum is found in one of the earliest yogic scriptures, the Isha Upanishad, although its exact date and authorship are unknown, this short text is believed to have been composed between 1-1000 BC. The term originates from ancient Vedic scriptures, most notably appearing in the Isha Upanishad (verse 16). Examples include Sannyasa Upanishads such as Naradaparivrajaka Upanishad, Nirvana Upanishad, and Maitreya Upanishad, as well as Yoga Upanishads such as Dhyanabindu Upanishad and Yogashikha Upanishad. In the Hamsa Upanishad and Vijnana Bhairava Tantra, the natural breath-mantra is described as Hamsa (So Hum in reverse), the sound the life-force makes as it moves in and out of the body. The texts state that every living being performs this japa automatically, 21,600 times per day.
The Vijñāna-bhairava-tantra is a Shiva Tantra of the Kaula Trika tradition of Kashmir Shaivism; it is difficult to establish an exact date for the text, and it could have been written at some time from the 7th to the 8th century CE. Classical yoga treatises Gheranda Samhita and Shiva Samhita all make mention of Soham and Hamsa, teaching uniformly “so” on inhalation and “ham” on exhalation. There exists variation in the tradition: some lineages, particularly those rooted in Tantra and Kashmir Shaivism, reverse the syllables to “Hamsa” (“ham” on inhale, “sa” on exhale), though the philosophical meaning remains identical. The practice has been transmitted through multiple Vedantic and yogic lineages, including Advaita Vedanta schools and Nath tradition Hatha yoga.
How It’s Practiced
Practitioners typically begin by sitting in a stable, upright posture with the spine aligned. Close your eyes and take a few moments to observe the inflow and outflow of your breath. Now take a slow, deep breath through your nose, while thinking or silently repeating the word So. Then slowly exhale through your nose while silently repeating the word Hum. The repetition is mental, not vocal; the mind simply notices the syllables as they arise with the natural rhythm of breathing.
The practice of So Hum meditation involves repeating the mantra silently to yourself, while focusing on your breath and allowing your thoughts to come and go without judgment or attachment. When the repetition of the So Hum mantra is linked with the rhythm of the breath, it creates a powerful and calming effect on the mind and body. When attention drifts, the instruction is simple: return gently to the mantra and the breath. So Hum Meditation is practiced between 5-10 minutes at a time. Teachers usually recommend practicing this meditation several times a week for optimal benefits.
Some teachers introduce variations, including visualization of the breath’s pathway through the body or pausing briefly at the transitions between inhale and exhale. In Kashmir Shaivism approaches, practitioners may pause awareness at the end of each breath cycle, noting the stillness between breaths as the glimpse of pure consciousness.
So Hum Meditation Today
So Hum meditation is widely taught across yoga studios, meditation centers, and Ayurvedic wellness programs in the West and India. It appears in the curricula of teacher training programs, especially those rooted in classical yoga or Vedantic philosophy. The practice is accessible through apps such as Insight Timer, which hosts hundreds of guided So Hum sessions, and is taught at institutions like the Chopra Center, which integrated it into its meditation instruction. Retreat centers in Rishikesh, Pune, and Kerala offer immersive programs that include So Hum alongside pranayama and asana. The technique is frequently recommended to beginners because it requires no belief system, no guru initiation, and minimal instruction—making it one of the most democratic of mantra practices.
Common Misconceptions
So Hum meditation is not Transcendental Meditation ™. TM uses individualized Sanskrit mantras selected by a trained teacher and follows a specific protocol developed by Maharishi Mahesh Yogi. So Hum is an open-source mantra requiring no initiation fee or organizational affiliation.
It is not inherently a Hindu religious practice, though it originates in Hindu philosophical texts. It has roots in Hindu Vedantic philosophy, specifically the Upanishads. The mantra itself is a philosophical identity statement (“I am that”), not a devotional prayer. Thousands of secular practitioners, Buddhist meditators, and people with no spiritual framework at all use So Hum purely as a breath-attention technique.
So Hum is not a “manifestation” or “affirmation” technique designed to attract external outcomes. Its purpose is self-recognition, not self-improvement. While practitioners may experience reduced stress, improved focus, or emotional balance, these are considered secondary effects, not the goal.
Finally, there is no single “correct” breath pattern. Swami Muktananda—although teaching the traditional “so” on inhalation and “ham” on exhalation as a letter from 1968 reveals—later published a book teaching “ham” on inhalation and “sa” on exhalation. Both orientations exist in the tradition.
How to Begin
Beginners may start with a 10-minute daily practice, ideally at the same time each day to build consistency. Find a quiet place, sit comfortably with the spine upright, and close the eyes. Spend the first minute simply observing the natural breath, then begin mentally placing “So” on the inhale and “Hum” on the exhale. Do not force the breath into any particular rhythm; let the mantra adapt to the breath’s natural pace. When the timer sounds, release the mantra and sit in silence for one to two minutes before opening the eyes.
For guided instruction, Yoga International offers a detailed step-by-step article by senior teachers. The book Soham Yoga: The Yoga of the Self by Abbot George Burke (Swami Nirmalananda Giri) compiles Upanishadic references and provides commentary. Dr. Vasant Lad’s writings on So Hum meditation, available through Banyan Botanicals, root the practice in Ayurvedic physiology. For those seeking in-person instruction, any teacher trained in classical yoga, Advaita Vedanta, or the Bihar School of Yoga (founded by Swami Satyananda Saraswati) will be familiar with the technique.