“Sumeru, Dhyana and Bhajan”
According to Sri Radhasoami of Dayalbagh, the above three are the procedures in the main; the foremost being the theory and practice of sound. Swamiji in his works cites examples of Mohammad and ancient Persian saints of having practiced sound theory for long and perfected themselves.
He, in the same work has pointed out that whereas other Mantras initiated into takes the Ego of the man from the Navel region onto the heart center at the most, the latter being the seat of feelings, leaves something to the disciples trial to do away with in his upward march to the throat and thence to Ajna chakra in between the eyebrows (the third eye). But it is only ‘Pranava’ and ‘so-ham’ that makes one find the root-cause of vital breath and thought. (i.e.) mind being the Agna Chakra and is the seat of light. With this he assures that there is no fear of fall from his seat and of being lured into mundane thoughts. Hence it is one feels his identity with Brahma and perceives the world not to be different from Brahma. As he is part of the zone of “Vishuddha” (throat center), the seat of Siddhis there is no fear of being tempted by the hydra-headed serpent the Ego.
The states enjoyed in various centers or plexes are given in books like “Shat-Chakra Darsana”, “Hatha Yoga Pradipika”, etc.
‘So-ham’ is also the perfection of Sakara-Siddhi, in that the devotee does not feel himself separate from his deity but finds identity with his breath and therefore Mother initiates her offspring in ‘Ajapa’ – ‘So-ham’, later converted into two syllables ‘Am, Aa’ – one to inhale and the other to exhale – ‘o’ being the vacuum, void or paripurnam.