यथा प्रकाशयत्येकः कृत्स्नं लोकमिमं रविः | क्षेत्रं क्षेत्री तथा कृत्स्नं प्रकाशयति भारत ||१३-३४||
yathā prakāśayatyekaḥ kṛtsnaṃ lokamimaṃ raviḥ . kṣetraṃ kṣetrī tathā kṛtsnaṃ prakāśayati bhārata ||13-34||
13.34. Just as a single sun illumines this entire world, so also the Lord-of-the-Field illumines the entire Field, O descendant of Bharata !
Shri Purohit Swami
13.34 As the one Sun illuminates the whole earth, so the Lord illumines the whole universe.
Sri Abhinav Gupta
13.31-34 Yada etc. upto na upalipyate. When [a man of Yoga] perceives the mutual difference i.e., separateness of all beings (all mutually different beings) in the very Self on account of Its all pervasive nature and realises the said difference as having sprung up from the Self alone - even then he does not get any stain. For [in that case] he would be the creator (or performer) of all. For, he is none but the Supreme Self; and though residing in the body, he is not stained just as the Eather is [not stained].
13.34 As the ‘one sun’ illumines ‘all this world’ by his radiance, so the ‘knower of the body’ illumines the entire Ksetra, i.e., the body, by Its own knowledge, within and without and from head to toe, by conceiving ‘This my body is of this nature.’ This self of the said nature is totally different from the body, because It is the knower of the body. The body is the object of Its knowledge and is therefore different from It, even as the illuminating sun is totally different from the illumined world.
13.34 Yatha, as; ekam, the one; ravih, sun; prakasayati, illumines; imam, this; krtsnam, whole; lokam, world tatha, similarly;-who?-ksetri, the Knower of the field, i.e. the supreme Self, though one; prakasayati, illumines; krtsnam, the whole; ksetram, field, from the ‘great elements’ to ‘fortitude’ (cf. 5-6). Here the illustration of the sun serves to highlight two aspects of the Self, viz that, like the sun, the Self is one in all the fields, and that It remains unaffected. This verse is meant for summarizing the idea of the whole of this chapter:
13.34 As the one sun illumines this whole world, so does the Knower of the Field (Ksetrin, the self), O Arjuna, illumine the whole Field (the body).
13.34 As the single sun illumines this whole world, similarly, O descendant of the Bharata dynasty, the Knower of the field illumines the whole field.
13.34 Just as the one sun illumines the whole world, so also the Lord of the field (Supreme Self) illumines the whole field, O Arjuna.
13.34 यथा as? प्रकाशयति illumines? एकः one? कृत्स्नम् the whole? लोकम् world? इमम् this? रविः sun? क्षेत्रम् the field? क्षेत्री the Lord of the field (Paramatma)? तथा so? कृत्स्नम् the whole? प्रकाशयति illumines? भारत O descendant of Bharata (Arjuna).Commentary The Supreme Self is one. It illumines the whole matter from the Unmanifested down to the blade of grass or a lump of clay? from the great elements down to firmness or fortitude. (Cf. verses 5 and 6.) Just as the sun is one? just as the sun illumines the whole world? just as the sun is not tainted? so also the Self is One in all bodies? It illumines all the bodies and It is not contaminated.