The Shulchan represented wealth and Malchus, like the saying: “Shulchan Melochim”. (Rashi). What do kings have to do with tables? And why did Dovid (the true king) have to be a person with an unusual Yetzer Hara (an Admoni, like Eisav, L'havdil).
The idea of Malchus is to be: מוֹשֵׁל in control over your own Retzonos, and to be a “Melech” over your: אֵב רִים limbs. If you don’t have a strong Yetzer Hara, then you cannot be considered as if you are really exercising your self-control over anything.
The Rambam calls the section that deals with Melochim: ה ל כוֹת מ ל כ ים וּמִ לְ חַ מוֹתֵ יהֶ ם The Halachos of kings and their wars. A Melech goes to war. And against whom does he war? Against his true enemy; i.e., the Yetzer Hara. (Chovos Halvavos). That’s why Dovid had to have a difficult Admoni nature, with plenty of fighting to do, so he could be the true Malchus. And a Shulchan (table) symbolizes Ta'avos Olam HaZeh, which have to be restrained and/or conquered. That’s why the Shulchan had a: מ ס גֶרֶת fence, besides the: רזֵ crown.
This is similar to the: סוֹרֵג “Soreg”, which was a fence that encircled the: עַז רִה courtyard of the Bais Hamikdash to keep out those who don’t belong (a Tamei and a Goy who doesn’t restrain). We can suggest that the Shulchan can include anyone, not only Malchus Bais Dovid, since every human can become a: מוֹשֵׁל ruler over his Ta'avos. Malchus can extend to others besides Malchus Bais Dovid, as Chazal say: מַאן מַל כֵי רַבּ נִן Who are the real kings? The Chachomim.
The best part of you, your glory, and your shine, is your Yetzer Hara!
