Rashi says that Shabbos is mentioned before the building of the Mishkan, to teach us that building the Mishkan is not: דוֹחֶַׁהַש ַב ַת (take priority over) Shabbos. We can suggest that there is also a general message and Remez here. Building of the Mishkan is called Meleches Shamayim. It is very precious, and therefore it is repeated so many times (similar to: י פֶַׁהַשׂ ַיח ַתַע ַבְַדֵַיַא ַבוֹתַ the conversation of Eliezer Eved Avraham, which is repeated twice and at length in great detail). A person shouldn’t forget to rest! You can get carried away with your learning and davening, and people become too intense in their holy fervor.
Rejuvenation is necessary for learning! The Chofetz Chaim Zatzal would close the lights of his Yeshiva at 12:00, because if Bachurim don’t get their sleep, they can end up losing plenty of Torah. Our holy Shabbos is a general message. First, as a reminder that ideally, Hashem wants us always in a “Shabbos mode”, similar to Gan Eden, where Adam HaRishon did zero and just enjoyed Hashem’s beautiful world. Also, this is why it says: תֵע שֶׁׂהַמְל אכ ה the work shall “be done” (as if it’s happening by itself) and by resting on Shabbos you’ll remember that when you’re building the Mishkan it’s not really the person doing.
It’s all Hashem, and everything we do is actually only Hashem who gives us the Koach. So before we build the Mishkan, we remember Shabbos Kodesh. And we are reminded again and again: ה א ד םַַ לֹאַנ בְר אַאֶׁל אַלְה תְע נֵּגַע לַַה' a person was created only to have pleasure in Hashem, and: ת ח תַאֲשֶׁרַלֹאַע ב דְ ת ַַ אֶׁתַה'ַאֱלֹקֶׁיךַבְשׂ מְח הַַתבאַ כחַ מז not serving Hashem with Simcha brings all the Tzaros and Churbanos. Similar to the generation of Churban Bayis Sheini who were Osek (involved) in Torah and Chesed but had Sin'as Chinam. When you are nervous and intense in your Avodas Hashem it is a sign that you are forgetting Hashem, and: ש ב תַה יוֹםַַַל ַה' the day of Shabbos for Hashem reminds you to work with Menucha.
In Novardok they were constantly saying: לֹאַ ע לֶׁיךַ ה מְל אכ הַ ל גְמוֹרַַאבותַ בַ טז You are not responsible to get it all done! I’m constantly meeting stressed out Ovdei Hashem, who may be big Masmidim and Askanim in Meleches HaKodesh, but they don’t know how to relax. R' Matisyahu Salomon Zatzal was a Talmid of R' Elya Lopian Zatzal from Kelm, where Menucha was paramount. And R' Matisyahu was a pleasure to observe in action; always relaxed.
He told me that the Menucha of Kelm was Bitachon. It’s not always easy to copy such a person, but with lots of Tefila, I’ve seen people become full of Menucha. P.S. If you are a hardworking intense Oved Hashem, you can hurt yourself in Ruchaniyus and Gashmiyus, Chas V’shalom, unless you work in a relaxed manner (like R' Moshe Feinstein Zatzal) or you take frequent breaks with total relaxation. בִּיטולָהּ זוֹהִּי קִּ יומָה Rejuvenation is necessary for learning!
