This Self is the honey of all beings, and all beings are the honey of this Self. Likewise this bright, immortal person in this Self, and that bright, immortal person, the Self (both are madhu). He indeed is the same as that Self, that Immortal, that Brahman, that All.

In plain words: The Self and all beings nourish each other like honey. The shining, deathless presence in everything is the very Self in us. It is the one Immortal, Brahman, which is all.