Chapter 4 – JnanaYoga
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Others, who have an urge for self-realization(jnana-dipite), in the yoga agni of atma samyama(controlling the mind and senses), offer all the functions of indriyas(senses) and prana(life breath).
Some people perform yajna by offering all the activities performed by their senses and the prana(inhaling, exhaling and other activities. There are supposedly 10 kinds), by controlling them with mind.
In other words, controlling senses and prana by controlling the mind is also yajna. And this controlling of mind can be achieved by knowledge.
Swamiji: It has to be our experience(Knowledge has to come by our experience).