There, on that seat, having sat down, let him practise yoga. How? Drawing the mind in from all objects and making it one-pointed, with the workings of mind and senses restrained: he whose workings of mind and senses are held in check. For what purpose should he practise yoga? For the purification of the self, for the cleansing of the inner instrument. The outer seat has been told; now how the body is to be held is told.
Contemporary English rendering of the Sanskrit bhāṣya, pending scholar review.