“The Yoga Sūtra is divided into four chapters.
The first chapter called Samādhi Pādaḥ assumes the aspirant
has progressed adequately to be in a state called Samāhita.
Such a person is not easily agitated.
They have a clearer perception to comprehend concepts such as Īśvara and Vairāgya.”
– T Krishnamacharya introduction to Yoga Sūtra Chapter One