The literal meaning of Krishna's statement in the Bhagavad Gita is straightforward: if you can perceive the Supreme Lord, the divine essence, residing within every single creature, then you are, in effect, seeing the entirety of the universe.

From the perspective of Advaita Vedanta, a prominent school within Hinduism, this quote points to the ultimate non-duality of existence. The 'Supreme Lord' is Brahman, the singular, all-pervading reality. Individual beings, or jivas, are not truly separate from Brahman; their perceived individuality is an illusion (maya). When one overcomes this illusion through spiritual realization (jnana), they understand that the same divine consciousness that animates one being animates all. This is not merely an intellectual understanding but a direct experiential realization of oneness, where the distinction between self and other, subject and object, dissolves. The seer, the seen, and the act of seeing become one unified reality, identical with Brahman. This is the state of seeing 'everything' because everything is, in essence, the one divine reality.

In your life: Practice looking for the shared spark of consciousness in those you encounter, even those with whom you disagree, to foster a sense of interconnectedness.