“Śraddhā is essential for progress, whether in Yoga or any other endeavour.
It is a feeling that cannot be expressed or intellectually discussed.
It, however, is a feeling that is not always uncovered in every person.
When absent or weak,
it is evident through the lack of stability and focus in a person.
Where present and strong, it is evident through the commitment,
perseverance and enthusiasm the person exhibits.
For such a person, life is meaningful.”
– TKV Desikachar on Yoga Sūtra Chapter One verse 20