Hatha yoga "voidness" ideas found respectively in Hinduism and Buddhism. Some traditions such as the Kaula tantric sect of Hinduism and Sahajiya tantric sect of Buddhism pursued more esoteric goals such as alchemy (Nagarjuna, Carpita), magic, "kalavancana" (cheating death) and "parakayapravesa" (entering another's body). James Mallinson, however, disagrees and suggests that such fringe practices are far removed from the mainstream Yoga's goal as meditation-driven means to liberation in Indian religions. The majority of historic Hatha yoga texts do not give any importance to "siddhis". The mainstream practice considered the pursuit of magical powers as a distraction or hindrance to Hatha yoga's ultimate
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