Over the years of yoga practice, I have developed my own definition of what the true āsana is. The right āsana is that, which leads to the interconnection of the two main dimensions of all. And through this in particular you will find explanations of any categories of āsanas. What those dimensions are, physical and spiritual or other explanations will be found for this, for everyone at their stage of practice, this can vary and can always be flexible. But, for any practitioner at any moment, this awareness of polarities must be total.