सूर्यरथ-कालचक्र-आयनविभागः, संध्योपासनम्, देवयान-पितृयानम्, विष्णुपद-गङ्गावतरणम्
नैवास्तमनम् अर्कस्य नोदयः सर्वदा सतः उदयास्तमनाख्यं हि दर्शनादर्शनं रवेः
naivāstamanam arkasya nodayaḥ sarvadā sataḥ udayāstamanākhyaṃ hi darśanādarśanaṃ raveḥ
சூரியனுக்கு உண்மையில் ‘உதயம்’ இல்லை, ‘அஸ்தமனம்’ இல்லை; அவர் எப்போதும் இருப்பவர். ‘உதயம்’ ‘அஸ்தமனம்’ எனப்படுவது ரவியின் காண்பதும் காணாமலும் மட்டுமே.
Sage Parāśara (teaching Maitreya)
It shifts the explanation from the Sun ‘changing’ to human perspective changing—rising/setting are names for visibility and invisibility, supporting a cosmology grounded in order rather than contradiction.
He defines them conventionally: the Sun is always existent, while ‘rising’ and ‘setting’ are simply the Sun being seen or not seen from a given standpoint.
By emphasizing stable cosmic law and true being versus appearance, the Purana implicitly aligns the ordered cosmos with the sovereignty of the Supreme Reality (Vishnu) who sustains the regularity of time and the heavens.