Yoga sutra 1.13
tatra sthitau yatno-‘bhyāsaḥ
Practice is the sustained effort to remain in a place of mental stability
Sutra 1.12 stated that through diligent practice and detachment you can attain spiritual self-mastery. Now Patanjali defines practice in greater detail.
Patanjali's instruction brings us back to the core element of regular practice: constant effort applied towards inner steadiness. Inner steadiness brings about complete harmony (yoga).
Damian Cadman-Jones is an authorised teacher of Prana Vashya Yoga™