6.12 Pratisthapya, having established; sthiram, firmly; sucau, in a clean; dese, place, which is solitary, either naturally or through improvement; atmanah, his own; asanam, seat; na ati ucchritam, neither too high; na ati nicam, nor even too low; and that made of caila-ajina-kusa-uttram, cloth, skin, and kusa-grass, placed successively one below the other-the successive arrangement of cloth etc. here is in a reverse order to that of the textual reading-.
What follows after thus establishing the seat? 
 
Upavisya, sitting; tatra, on that; asane, seat; yogam yunjyat, he should concentrate his mind. To what purpose should he concentrate his mind? In answer the Lord says: atma-visuddhaye, for the purification of the internal organ. How? Krtva, making; manah, the mind; ekagram, one-pointed,by withdrawing it from all objects; and yata-citta-indriya-kriyah, keeping the actions (kriyah) of the mind (citta) and senses (indriya) under control (yata).
The external seat has been spoken of. Now is being stated how the posture of the body should be: