“The ideal Dhyānam,
which becomes easier with practice,
requires certain preparations to reduce
the tendency of the mind to be distracted,
either by being jumpy and agitated, or dull and inert.
Chief among these preparations are proper diet and Prāṇāyāma.”
– T Krishnamacharya on Yoga Sūtra Chapter One verse 2

“Working together with and directed by past impressions,
the three Guṇa, Sattva, Rajas and Tamas determine
whether the mind is calm, agitated or dull.”
– T Krishnamacharya on Yoga Sūtra Chapter One verse 4

“What is Samādhi?
It is the ability to experience the true nature of the objects of Meditation,
through a mind rid of the provocation of excitability and inactivity.”
– T Krishnamacharya on Yoga Sūtra Chapter One verse 20

“These five Kleśa surround the heart of every individual.
They are related to the three Guṇa known as Sattva, Rajas and Tamas.
As long as one chooses not to inquire into the true nature of one’s self and acts mechanically,
they will unknowingly contribute to the dominance of the Kleśa.”
– T Krishnamacharya on Yoga Sūtra Chapter Two verse 3

“When Kleśa are on  the move, time should not be lost.
Reflection is a must.
Reduction of all the factors that increase Rajas and Tamas,
including right food, company, study and Niyama is a must.
Without them, reflection leading to a reduction of the power of Kleśa will not work.”
– T Krishnamacharya on Yoga Sūtra Chapter Two verse 11

“Sthira is the absence of Rajas.”
– TKV Desikachar on Yoga Sūtra Chapter Two verse 46

“Without Rajas Guṇa
there can be no Pariṇāma.”
– T Krishnamacharya on Yoga Sūtra Chapter Three verse 16

‎”Use Samavṛtti in Prāṇāyāma to reduce the power of Rajas and Tamas.”
– T Krishnamacharya on Bhagavad Gītā Chapter Five verse 27

“Its the combination (of Guṇa) thats important.
There is the simile of the oil lamp in the Sāṃkhya Kārikā Śloka 13.
The cotton wick – Light Property (Sattva)
The basin or bowl – Heavy Property (Tamas)
The oil – Flows this way or that (Rajas)
The moment you dip the cotton in the oil it takes on that property.
Thus the Guṇa work together to produce the flame.”
– TKV Desikachar on Sāṃkhya and Yoga

“Lightness or Sattva is not always correct.
Sometimes it is necessary to create
heaviness and activity for memory, etc.”
– TKV Desikachar on Sāṃkhya and Yoga

“There is an impression in some schools that Tamas and Rajas are to be rejected.
This is not so, both are necessary. It is the combination thats important.”
– TKV Desikachar on Sāṃkhya and Yoga

“For me, still to this day, one of the simplest, direct and most succinct definitions on the purpose of Āsana within the processes and practices of Haṭha Yoga, is the definition offered in the Haṭha Pradīpikā Chapter One verse 17.
It is a definition valid for any situation, discussion or presentation, or as a response to questions from any background, or level of interest around why we practice Āsana.
It can also be a springboard to linking physiological qualities, such as the relationship of Agni, to the energetic qualities of health and lightness of limb. Or investigation of the commentary by Brahmānada, as that explores psychological qualities such as the relationship of the Guṇa, Rajas, to mental qualities such as steadiness.”
– Paul’s Short & Longer Yoga Practice Theory Articles – Collected & Collated

Links to Related Posts:

• The Viniyoga of Āsana Part 1 of 15 – Āsana according to Haṭha and Rāja
• Yoga Sūtra on Stress – An interview with TKV Desikachar