“In the second and third Sūtra the means to realise Samādhi
and the true nature of Jīva were explained.
The term used in those Sūtra is Draṣṭṛ
– that which perceives and aids in perception.”
– T Krishnamacharya’s commentary to Yoga Sūtra Chapter One verse 23

“It is through Praṇavo Japam that the true nature of the Jīva is realised.”
– T Krishnamacharya’s commentary to Yoga Sūtra Chapter One verse 29

“Serious practitioners of Yoga from Vedic times to the present day
emphasise that a clear mind is a prerequisite for Bhakti and
that it is only through Bhakti that the true nature of the Jīva is revealed.
Bhakti, singe minded and abiding, is the mark of a certain unique relationship
characterised by unshakeable faith, absolute trust and boundless devotion.”
– T Krishnamacharya commentary on Yoga Sūtra Chapter One verse 30

“Union of Jīva Ātman and Parama Ātman is a Siddhi not a Sādhana when it is felt or realised.
If this is clear then Rāja Yoga is a Siddhi.
However one has to work for it in Sādhana.
Anything that takes you in this direction is a Sādhana.”
– TKV Desikachar France 1983