Āsana, according to this verse, needs to correlate the
two qualities of steady attentiveness and spacious clarity.
However, we are being offered qualities that are actually
the fruits or outcome of the practice guidelines in the next verse.
Hence this verse is a definition, but one that arises as an outcome
of an attitude around the way we go about exploring Āsana.
Although it could be added that this definition also relates
to the direction of one’s Āsana practice as a whole.
– Paul Harvey on Yoga Sūtra Chapter Two verse 46
Paul’s Yoga Mālā – A Thread of Pearls from Patañjali’s Yoga Sūtra