Sadhana Pada is the book focused on practice. And we've been practicing. As we travel through the second book of the Yoga Sutra we soon learn that the piece we're mostly drawn to; the asana, are nothing without the breath. Patanjali tells "once you have perfected the pose, then practice the breath." I don't know about you, but I'm far from perfect as far as my asana practice goes.
Svadhyaya is about the Self. As we practice asana, we learn about the areas in which we hold back, the places where we push too hard and when we have and lack flexibility. These are all reflections of how we live our lives. Our breath and the ability to move our breath, can help us to release, engage and move not only our bodies but our selves.
As you practice your asana and get closer to your own perfection, don't forget to breathe. Each breath creates space, openness and connection. Use your breath to discover your Self.