Bhagavad-Gita The Song Divine Chapter 15 (stanza 12-20)

This radiance in the sun that illumines the entire world, and that which shines in the moon and that which shines in the fire too, know that radiance to be Mine. ……………….. (12)

And permeating the soil, it is I who support all creatures by My vital energy, and becoming the sapful moon, I nourish all plants. ………………….. (13)

Taking the form of fire, as Vaisvanara, lodged in the body of all creatures and united with the Prana (exhalation) and Apana (inhalation) breaths, it is I who digest and assimilate the four kinds of food. …………… (14)

It is I who remain seated in the heart of all creatures as the inner controller of all; and it is I who am the source of memory, knowledge and the ratiocinative faculty. Again, I am the only object worth knowing through the Vedas; I alone am the origin of Vedanta and the knower of the Vedas too. ……………………. (15)

The perishable and he imperishable too- these are the two kinds of Purusas in this world. Of these, the bodies of all beings are spoken of as the perishable; while the Jivatma or the embodied soul is called imperishable. ……………….. (16)

Yet, the Supreme Person is other than these, who, having encompassed all the three worlds, upholds and maintains all, and has been spoken of as the imperishable Lord and the Supreme Spirit. …………….. (17)

Since I am wholly beyond the perishable world of matter of Ksetra, and am superior even to the imperishable soul, Jivatma, hence I am known as the Purusottama, the Supreme Self, in the world as well as in the Vedas. ……………. (18)

Arjun, the wise man who thus realizes Me as the Supreme Person - knowing all, he constantly worships Me (the all-pervading Lord) with his whole being. ………………..  (19)

Arjun, this most esoteric teaching has thus been imparted by Me; grasping it in essence man becomes wise and his mission in life is accomplished. ……………… (20)

Thus, in the Upanishad sung by the Lord, the Science of Brahma, the scripture of Yoga, the dialogue between Sri Krishna and Arjun, ends the fifteenth chapter entitled "The Yoga of the Supreme Person."