“What causes Duḥkha?
In the school of Sāṃkhya it arises from within, or from external influences,
or from extraordinary phenomena such as drought, storm, earthquake.
However, the experience of Duḥkha is not the same for everyone.
The same circumstance may not bring Duḥkha in erveryone.
Hence the cause of Duḥkha is association. Association implies “two”,
that which is “associated to” and that which is the “cause of association.”
In Yoga they are known as Draṣṭṛ and Dṛśya;
that which perceives and that which is perceived.
The next three Sūtra describe them.
How these two get associated is a subject matter of great debate.
Suffice it to say that this mystery is the Lord’s will.”
– T Krishnamacharya on Yoga Sūtra Chapter Two verse 17

“Sāṃkhya proposes a permanent solution to suffering.
If we look and see.
And see what produces what we see.”
– TKV Desikachar on Sāṃkhya and Yoga

“Sāṃkhya postulates what appears
and what causes it to appear.”
– TKV Desikachar on Sāṃkhya and Yoga

“Sāṃkhya will not make sense to
those people who have not tried anything.
i.e. Prayer, Mantra, Medicine.”
– TKV Desikachar on Sāṃkhya and Yoga

“Sāṃkhya and its aspects, what are the characteristics?
1. What is seen – The effect
2. What is not seen – The cause
3. What sees – Something other than cause and effect
The relationship between these three is discussed in Sāṃkhya philosophy.”
– TKV Desikachar on Sāṃkhya and Yoga

“Everything we see,
including the instrument of mind,
has three qualities or natures.
All matter has the three qualities.
In Saṃskṛta they are known as Guṇa.
In Sāṃkhya it is said that every problem
comes from the Guṇa and their interplay.
The effects can be based on what we see, eat, hear,
and the effects of what we see, eat, hear.
In Yoga one who has mastered themselves is one
who can produce whatever Guṇa is required.”
– TKV Desikachar on Sāṃkhya and Yoga