There is a difference between “the presence of the Shekhinah” and “the emanation of the Shekhinah.”
The presence is the Shekhinah is a reference to the Shekhinah as it exists in everything, filling all worlds … and giving life and being to all.
“The emanation of the Shekhinah” on the other hand, is the exceptional “revelation of His blessed unity.”
The revelation of the emanation of the Shekhinah is not mysterious and hidden but revealed and felt.
The Holy of Holies is that point within existence that reveals the Shekhinah, which is the divine unity that envelops everything and is found everywhere.
—Rabbi Adin Steinsaltz