Know that I am the light of the sun, the moon and fire that illuminates the entire world.
Bhagavad Gita - Chapter 15 - Purushottama Yoga - The Yoga of the Supreme Person
By My potency I enter the earth and maintain all living beings. I nourish all plants by becoming the moon, and provide them with the essence of life.
I am the fire of digestion that resides in all beings, and I unite with the incoming and outgoing life airs to digest all types of food.
I am situated in the hearts of all living beings, and from Me arises remembrance, knowledge and forgetfulness. I alone am to be known through all the Vedas. I reveal the Vedanta and am the knower of the Vedas.
There are two types of beings – those in the material world and those in the spiritual world (Vaikuntha). In the material world all living beings are fallible. In the spiritual world, all living beings are said to be infallible.
Yet there is another Being – the Supreme Person, the imperishable Super Consciousness, who enters the upper, middle and lower planetary systems and maintains them.
I am superior to all fallible beings and I transcend even those who are infallible. Thus I am glorified throughout the universe and in the Vedas as the Supreme Person (Purushottama).
O Bharata, whoever is free from bewilderment knows Me as the Supreme Person. Such a person knows everything and worships Me with all his heart.
O faultless one, I have thus explained to you the greatest secret of the shastra. By understanding this, O Bharata, one finds wisdom and all his activities become perfect.