सूर्यरथनिर्णयः (चन्द्रस्य पक्षवृद्धिक्षयविधानम्)
आपूरयन् सुषुम्नेन भागं भागमनुक्रमात् इत्येषा सूर्यवीर्येण चन्द्रस्याप्यायिता तनुः
āpūrayan suṣumnena bhāgaṃ bhāgamanukramāt ityeṣā sūryavīryeṇa candrasyāpyāyitā tanuḥ
సుషుమ్నా మార్గమున భాగం భాగంగా క్రమానుసారంగా నింపుతూ—ఇలా సూర్యవీర్యముచే చంద్రుని దేహము పోషింపబడి వృద్ధి చెందుతుంది.
Suta Goswami (narrating the Purana’s teaching to the sages; internal yogic-cosmic explanation)
It links outer worship to inner yoga: as the Moon is nourished by the Sun’s power, the devotee (pashu) is strengthened by directing prāṇa through the central channel, making the body-mind fit for steadfast Shiva-bhakti and Linga-upāsanā.
Shiva-tattva is implied as Pati—the sovereign regulator behind cosmic and subtle processes—by whose ordinance energies circulate and sustain beings; the Sun–Moon dynamic becomes a sign of ordered power (śakti) operating under the Lord.
A nāḍī-centered yogic discipline: guiding prāṇa through Suṣumnā step-by-step (krama), akin to Pāśupata-oriented inner practice where breath and energy are refined to loosen pāśa (bondage).