Chapter 13 · The Field and the Knower · Krishna said
Bhagavad Gita 13.34 — Like the sun lighting the world
यथा प्रकाशयत्येकः कृत्स्नं लोकमिमं रविः। क्षेत्रं क्षेत्री तथा कृत्स्नं प्रकाशयति भारत ॥
yathā prakāśayatyekaḥ kṛtsnaṃ lokamimaṃ raviḥ | kṣetraṃ kṣetrī tathā kṛtsnaṃ prakāśayati bhārata ||
Meaning
Just as the one sun lights up this whole world, so the knower of the field lights up the entire field, Arjuna.