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

In plain words: The earth and all living beings feed and sustain each other, like honey (madhu) that nourishes. The bright, deathless presence in the earth and the same presence in our body are one. It is the Self, the immortal Brahman, the All.