“When something is understood differently from what it truly is, it is called Avidyā.
What is changing is taken to be non-changing. For example the mind.
What is subjected to decay is assumed to be pure. For example the body.
What is leading to suffering is taken to be the source of pleasure.
What is not conscious is assumed to be conscious.
All these errors in perceptions have many possibilities.
But the ultimate stage of Avidyā is to assume that we are the Masters, not Īśvara.”
– T Krishnamacharya on Yoga Sūtra Chapter Two verse 5

“Still subtler layers of meditative reflection
as in Samādhi, can reveal the source of this
confused sense of “I” Am-ness, as in leading us
to the roots from which the tree trunk, and then
the branches grew, namely the ultimate illusion.
These hidden roots sustain this existential illusion
where, what in reality is transient, adulterated,
infused with suffering and non-Spiritual,
is personally lived and experienced as if
everlasting, unadulterated, infused
with pleasant feelings and Spiritual.”
– Paul Harvey on Yoga Sūtra Chapter Two verse 5