The Prashna Upanishad with Shankara’s Commentary
अथादित्य उदयन्यत्प्राचीं दिशं प्रविशति तेन प्राच्यान्प्राणान्रश्मिषु सन्निधत्ते । यद्दक्शिणां यत्प्रतीचीं यदुदीचीं यदधो यदूर्ध्वं यदन्तरा दिशो यत्सर्वं प्रकाशयति तेन सर्वान्प्राणान्रश्मिषु सन्निधत्ते ॥ ६ ॥
athāditya udayanyatprācīṃ diśaṃ praviśati tena prācyānprāṇānraśmiṣu sannidhatte । yaddakśiṇāṃ yatpratīcīṃ yadudīcīṃ yadadho yadūrdhvaṃ yadantarā diśo yatsarvaṃ prakāśayati tena sarvānprāṇānraśmiṣu sannidhatte || 6 ||
6. Now the sun rising enters the east. By that, he bathes, in his rays, all prâna in the east. When he lights up the south, the west, the north, the nadir, the zenith, the inter-space and all, by that, he bathes in his rays, all prâna.
Com.—Similarly, though formless the prâna, i.e., the eater, is all, and food also is prâna; how? Now the sun rising, i.e., becoming perceivable by the eyes of living beings, lights up the east with his light; by thus pervading all with his light makes all the lives in the east one with his own self, all living beings being pervaded by his all-pervading rays of light; similarly also, when he lights the south, the west, the north, the nadir, the zenith, the inter-space, the cardinal points and those between them, he bathes all lives in all those directions in his all-pervading light.