“Most commentaries fail to point out the great similarities
between the Yoga Sūtra and the Brahma Sūtra when,
in fact, one of the only differences is in regard to
the distinction between Jīva, Prakṛti, and Īśvara.

In two distinguished texts, the Puruṣa Nirṇaya and Īśvara Siddhi,
the sages Nathamuni and Yāmunamuni speak of the
teachings in Yoga Sūtra with the highest regard.

Both these texts emphasise the value of Yoga Sādhana,
in developing devotion to Īśvara and the power of Vāsana
to inspire a person to reach Asaṃprajñāta Samādhi.”
– T Krishnamacharya on Yoga Sūtra Chapter One verse 19

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