नासिकान्तर्मध्यसंयमात्किमत्र सव्यापसव्यसौषुम्नेषु
In plain words
From on the inner of the nose, what need here of the left, the right and ?
The commentators
Śivasūtra with Kṣemarāja's Vimarśinī
अतश्च स्थितेऽपि नैसर्गिके प्राणसंबन्धे यस्तदारूढ आन्तरीं कलां विमृशन्नास्ते स लोकोत्तर एव इत्याह - नासिकान्तर्मध्यसंयमात् किमत्र सव्यापसव्यसौषुम्नेषु ॥ ४४ ॥ सर्वनाडीचक्रप्रधानरूपेषु सव्यापसव्यसौषुम्नेषु दक्षिणवाममध्यनाडीपदेषु या नासिका नसते कौटिल्येन वहति इति कृत्वा कुटिलवाहिनी प्राणशक्तिः तस्याः अन्तरिति आन्तरी संवित् तस्याः अपि मध्यं सर्वान्तरतमतया प्रधानम् । तस्य देवातिदेवस्य परबोधस्वरूपिणः । विमर्शः परमा शक्तिः सर्वज्ञा ज्ञानशालिनी ॥ इति श्रीकालिकाक्रमोक्तनीत्या यत् विमर्शमयं रूपं तत्संयमात् अन्तर्निभालनप्रकर्षात् किमत्र उच्यते अयं हि सर्वदशासु देदीप्यमानो निर्व्युत्थानः परः समाधिः । तदुक्तं श्रीविज्ञानभैरवे ग्राह्यग्राहकसंवित्तिः सामान्या सर्वदेहिनाम् । योगिनां तु विशेषोऽयं संबन्धे सावधानता ॥ इति ॥ ४४ ॥
In plain words
Through saṃyama on the centre within the nāsikā, what of the left, the right and the suṣumnā here? And so, even while the natural bond with prāṇa remains, the one who, risen to that, abides reflecting on the inner kalā is beyond the world. So he says: In the left, the right and the suṣumnā, the chief forms of the whole wheel of channels, the places of the right, left and middle channels, there is the nāsikā: the power of prāṇa that flows crookedly, so called because it moves (nasate) crookedly. Within it is the inner one, awareness; and the centre of that too, chief because it is the innermost of all, is the form made of reflective awareness, in the way stated in the Kālikākrama: "Of that God beyond the gods, whose nature is supreme awakening, reflective awareness is the supreme power, all-knowing, rich in knowledge." Through saṃyama on it, through excellence in beholding it within, what is there to say here? For this is the supreme samādhi, blazing in every state, with no coming out of it. As the Vijñānabhairava says: "Awareness of grasped and grasper is common to all embodied beings; but for yogins there is this distinction: attentiveness in the relation."