“The original essence of the Yoga Sūtra
was passed on by oral tradition.
First you learn the rhythm of the Sūtra.
This was in Saṃskṛta,
first learning the words or Sūtra, then the meanings.
By learning to recite the Sūtra perfectly it was clear
that you were earnest in wanting to learn their meanings.
The scheme would be to repeat it twice,
in exactly the same tone used by the teacher.
This would take many years.
Thus these days it’s difficult to expect to
understand the Sūtra from a book or a course.”
– TKV Desikachar 1979