1 Gita Sloka Every Day - Chapter 13 - Kshetra Kshetrajna Yoga - Sloka 33

The entire content of this mail is from Swami Adidevananda's translation of Ramanuja's  Gita  Bhashya and Swami Chidbhavananda's Bhagavad Gita, both published by Ramakrishna Mission

Further,

Brahman is Self sufficient 31-34

1 Gita Sloka  Every Day - Chapter 13 - Kshetra Kshetrajna Yoga - Sloka 33

Tiruppavai - Pasuram 2

Yatha prakash yatyekah krutsnam loka mimam ravih I

Kshetram kshetri tatha krutsnam  prakashyati bharata II sloka 33

यथा प्रकाश यत् येकः कृत्स्नं लोक मिमं रविः I 

क्षेत्रं क्षेत्री तथा कृत्स्नं प्रकाश यति भारत II श्लोक 33

As the one sun illumines the whole world, so does the 'Knower of the field' or kshetra (Kshetrin, the self) illumine the whole field  or kshetra (the body), O Bharata.

The sun that illumines the world is one without a second. Even so, the paramatman who gives spiritual luminosity to the entire universe is one without a second. All beings great and small, high and low, get their consciousness from the same source. While the sunlight falls equally on all things, the merits and demerits of those things do not affect the sun in any manner. In the same way the presence of the paramatman in the hearts of the multitudinous beings ever shines in its original glory. The purity of the heart of the saint does not increase the profundity of the glory of the paramatman. Neither does the impurity in the heart of the wicked diminish or tarnish the luminosity of the lord. He remains ever in his glory while providing life, light, and love to all beings.

Brahman is like a luminous lamp. One may utilise the light of the lamp for reading holy books while another may make use of it for preparing false documents. It is from Brahman that all get their power of understanding. The various uses to which the intellects of the beings are put do not affect Brahman. 

Sri Ramakrishna Paramahamsa