Avatarika
यस्तु हृदयपुण्डरीकगतं यथोक्तगुणविशिष्टं ब्रह्म ब्रह्मचर्या-दिसाधनसंपन्नः त्यक्तबाह्यविषयानृततृष्णः सन् उपास्ते, तस्येयं मूर्धन्यया नाड्या गतिर्वक्तव्येति नाडीखण्ड आरभ्यते—
In plain words
The text now begins the section on the subtle channels to explain how the seeker departs—one who has left behind all craving for unreal external things, who is grounded in disciplines like continence, and who meditates upon the Brahman residing within the lotus of the heart, endowed with all the qualities the scriptures declare.
Close to the Sanskrit
And who, equipped with disciplines such as celibacy, having abandoned all thirst for unreal external objects, worships Brahman residing in the lotus of the heart and characterized by the aforementioned qualities, his departure through the cranial channel is to be explained; thus this section on the channels is commenced.