When we refer to G‑d’s presence within our world, giving life to all things, then She is the Shechinah.

When we refer to G‑d’s transcendence beyond this world, we call Him “The Holy One, blessed be He.”

In our prayers, collectively our souls take the role of the Shechinah, petitioning the Holy One, blessed be He.

Our mitzvahs, our Torah study and our prayer unite these two aspects of G‑d into a perfect whole. Through them, we reveal the essential G‑d who is beyond beyond both the immanent and the transcendent—beyond all description and bounds.

And that is what we mean when we say, “On that day, G‑d will be One and His name will be One.”