The practitioner of drishti yoga [meditation, inner seeing] has to stop seeing outside, and begin to look within. As one’s vision gets steadied, the grand expanse of Light comes into view. This has been exquisitely portrayed by Sant Gulal Sahab: “Ulati dekho ghata mein joti pasara. Bina baje tahan dhuni saba hovai. Vigasi kamala kachanar, paithi patala sura sasi bandhau, sadhau trikutI dwara. Ganga jamuna ke wara para bicha. Bharatu hai amiya karara, Ingala pingala sukhamana sodho. Bahat sikhara mukha dwara. Surati nirati le baitha gagan para, sahaja uthai jhanakara.”
Translation: “Revert within [invert] and behold the stunning spectacles of Light within the body. Numerous melodies play there without the aid of any instruments. Flower-like Lotuses and Kachanar (Bauhinia Variegata) blossom there. Dive deep within, rein in the Sun (the Pingla nerve or the Yamuna) and the Moon (the Ida nerve or the Ganga), and train your attention at the doors of Trikuti. In the centre of the Ganga (Ida) and the Yamuna (Pingla) lies the repertoire of elixir. Merge the Currents of Ida and Pingla in the Sushumna, and lo! The Stream of Elixir is down-pouring from atop. When the surat [attention-faculty of the Soul] rises above and gets lost in the inner sky, spontaneously resonating Currents of Sound are heard.”
As a matter of fact, the art of drishti yoga or bindu-dhyana is confidential and has to be taught by an adept Guru [Living One, Living Master, Sant Satguru], without whom this would be but an extremely arduous task.
— Swami Achyutanand Baba, Maharshi Santsevi Dhyana Yoga Ashram, Kolkata, India (Based on an English translation provided by Pravesh K. Singh)