“Śraddhā can also mean resolution or resolve,
in spite of the obstacles, to move in the right direction.
Although, sometimes, when there is Rāga, a strong
desire, you will not stop until you have that thing.
Thus, the following differentiates Rāga from Śraddhā:
Vīrya – Vitality, vigour to pursue
Smṛti – Memory, it’s memory that starts one on the travel.
It is memory that keeps you on the right track.
Thus, it is vigilance or attentiveness.
Samādhi Prajña – To know, in detail or depth, Samādhi.
Thus we have a travelling from a minus to a
plus position through Śraddhā with Smṛti.
In Samādhi there is an understanding.
Something not based on your memories,
something that transcends your memories.
Prajña comes only in Samādhi.”
– TKV Desikachar on Yoga Sūtra Chapter One verse 20

– TKV Desikachar Yoga Sūtra Study Quotes Collected and Collated
– T Krishnamacharya Yoga Sūtra Study Quotes Collected and Collated