Soham (सो ऽहम् so-ham) means “I am He/That” in Sanskrit and is used as a mantra to identify/connect oneself with the universe or ultimate reality.
Combination of so-haṃ haṃsaḥ has also been interpreted as “I myself am the Swan“, where the swan symbolizes the Atman.
SoHam mantra is a natural mantra because it is already part of your nature.
It is found in the Isha Upanishad (verse 16), which ends:
…यत्ते रूपं कल्याणतमं तत्ते पश्यामि योऽसावसौ पुरुषः सोऽहमस्मि ॥१६॥
yat te rūpaṃ kalyāṇatamaṃ tat te paśyāmi yo ‘sāv [asau puruṣaḥ] so’ham asmi
Translation : The light which is thy fairest form, I see it. I am what He is.
The Soham mantra is also called the Hamsa mantra.
Hamsa (or hansa) poses the question, Who am I? Soham provides the answer, I am that.
SoHum is also refered in other upanishads like :
Sannyasa Upanishads such as Naradaparivrajaka Upanishad, Nirvana Upanishad, Ashrama Upanishad, Maitreya Upanishad and Satyayaniya Upanishad.
Yoga Upanishads such as Dhyanabindu Upanishad and Yogashikha Upanishad.
Sooooo… is the sound of inhalation, and is remembered in the mind along with that inhalation.
Hummmm… is the sound of exhalation, and is remembered in the mind along with that exhalation.
It is already an universal mantra because its vibration is already a part of our breath.
Sooooo… is the sound of inhalation, and Hummmm… is the sound of exhalation.
SoHam Mantra used to make DNA from 2 strand 97% junk , to 12 strand nil junk DNA
The best time to practice this mantra, is early morning with empty stomach.
The best pose is padmasana or sukhasana with fingers in gyan mudra (tip of index finger touching tip of thumb, while other 3 fingers remain straight).
Visualize divine golden light flowing into you when you inhale and mentally say SOoooo, and then when you exhale feel your ego-centric limited consciousness flow out and evaporate into the atmosphere (Hummmmmm)
As you say Mmmmm imagine the ball of golden light move in reverse, from the third eye back down the spine to its base (where Mooladhara Chakra resides normally).
The Hummmmmmmm will resonate your pineal gland, connected to Third Eye or Ajna Chakra (ideally at center of brow).
This mantra produces Nitric Oxide, which can regenerate brain cells quickly.
(Refer for advantages of Nitric Oxide production).