Hatha yoga made out of two Sanskrit words "prāṇa" (प्राण, breath, vital energy, life force) and "āyāma" (आयाम, restraining, extending, stretching). Some Hatha yoga texts teach breath exercises but do not refer to it as Pranayama. For example, "Gheranda samhita" in section 3.55 calls it "Ghatavastha" (state of being the pot). In others, the term "Kumbhaka" or "Prana-samrodha" replaces Pranayama. Regardless of the nomenclature, proper breathing and the use of breathing techniques during a posture is a mainstay of Hatha yoga. Its texts state that proper breathing exercises cleanses and balances the body. "Pranayama" is one of the core practices of Hatha
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