“The evolution of Samādhi is Sthūla Savitarkā to Sthūla Nirvitarkā.
This is Viniyoga Krama, then Sūkṣma Savicārā to Sūkṣma Nirvicārā.”
– T Krishnamacharya commentary to Yoga Sūtra Chapter Three verse 4
cross referencing to Yoga Sūtra Chapter One verse 42-44.
