“A human being is made up of the three Guṇa:
Sattva, Rajas and Tamas.
All three are important and have their respective roles.
The role of the Rajas Guṇa is to initiate action.
Every function of the body and action of the person is
because of the operation of the Rajas Guṇa.
Even breathing requires the action of the Rajas Guṇa.
In all his teachings, my father would always insist on action.
As long as a person is alive, the three Guṇa will exist in his system
thereby making action not only necessary but inevitable.”

– Yoga Sūtra on Stress – An interview with TKV Desikachar