Hatha yoga reverser, or to make breath flow into the center channel which forces bindu up. However, in later hatha yoga, the Kaula visualization of Kuṇḍalini rising through a system of chakras is overlaid onto the earlier bindu-oriented system. The aim was to access amṛta (the nectar of immortality) situated in the head, which subsequently floods the body. This goal is in contradiction with the early hatha yoga goal of preserving bindu. The "Hatha yoga pradipika" text dedicates almost a third of its verses to meditation. Similarly, other major texts of Hatha yoga such as "Shiva samhita" and "Gheranda samhita" discuss meditation.
Aparoksha from which unity of existence is derived. This knowledge is gained by establishing a "guru-shishya sambandha" (Guru-shishya tradition) with a teacher who has already experienced that kind of knowledge (Aparoksanubhuti); the karma or acts required to be done, after gain of "Aparoksha jnana" is "Vidya-karma" which consists in "sravana" (hearing of srutis), "manana" (reflection) and "nididhyasana" (meditation on Brahman). Aparoksha is "savikalpa jnana" (knowledge) when one re-recognizes the non-dual nature of the ever-realized Self (Tat Tvam Asi), it is the immediate knowledge gained through the "pramanas"; practice of "Dhyana" (meditation) removes all "vikalpas" (varied thoughts) and leads to "nirvikalpa" or