The original text is in Sanskrit, though various Hindi and English interpretations exist.
One of the most esoteric teachings is the Ajapa Gayatri —the unspoken mantra. The text explains that every living being naturally breathes 21,600 breaths per day, and this natural rhythm is the Ajapa Mantra (So-Ham). The Yogi learns to listen to this internal sound. goraksha samhita pdf upd