Kṛṣṇa gives a beautiful analogy to explain consciousness. Just as the single sun sits in one spot but illuminates the entire world with its light, the single soul sits in the heart but illuminates the entire body with consciousness. Consciousness is the ‘sunlight’ of the soul. This explains why we can feel a sensation in our toe and a thought in our head at the same time. The soul’s energy pervades every cell. If consciousness is present, the body is alive and ‘lit up’. The moment the soul leaves, the body becomes dark and inert, like the earth at night after the sun has set. This verse helps us identify our true self. We are not the organs or the blood; we are the ‘Illuminator’. By focusing on the source of our awareness rather than the objects we are aware of, we can find the eternal soul. We are the light, not the room.