“As Prāṇāyāma dissolves the covering of the light,
fitness of the mind for concentration arises.”
– Paul Harvey on  Yoga Sūtra Chapter Two verse 52

“The Yoga Sūtra says that as we practice Prāṇāyāma,
more and more of the covering of the mind,
Avidyā, is removed and there is clarity.”
– TKV Desikachar Religiousness in Yoga Chapter Ten Page 137

“From a Haṭha Yoga viewpoint,
Mudrā are utilised to
break through a blockage.
From a Rāja Yoga viewpoint,
Mudrā are utilised to
break down distractions.”
– 108 Mudrā Practice Pointers

“The role of Prāṇāyāma, both short-term and long-term,
is a vital consideration, integral to the essence of Dhyāna,
in the preparation by honing the mind’s fitness for Dharana.
Both within the teachings of Patañjali and, especially as seen
within the Yoga taught by Krishnamacharya and Desikachar.”
– 108 Prāṇāyāma Practice Pointers

“Prāṇāyāma is regarded as a Tapas,
a Kriyā, which cleanses the Nāḍī,
It is a Sādhana which sharpens Agni
and helps to dissolve obstacles, thus
making the mind fit for attention.”
– 108 Yoga Practice Pointers