Parshas Naso

The last part of the Parsha talks about the chanukas hamishkan and the twelve days that followed. (Interesting to note that that day in history- the First of Nissan- is mentioned in Sefarim Shemos, Vayikra and Bamidbor). The narrative begins with "B'yom kalous Moshe lhokim es hamishkan"- The day Moshe set up the Mishkan. The Medrish compares the Mishkan to the creation of the world and ends off with the comparison of the word ‘kalous’ with the word “Vayichal’ Elokim bayom hashevie” - from the posak that completed the creation of the world. The Alshach explains this with a famous Medrish. The Medrish says that the Seven days prior to the building of the Mishkan, Moshe would set up the Mishkan and dismantle it twice a day- once for the morning Korban Tomid and one for the evening one. What needs understanding is- why did Moshe have to dismantle it every day? Couldn’t he just leave it standing throughout the week? The Alshach explains that the Mishkan couldn’t stand naturally, only through a nes. The Mishkan in its mere physical state could not stand, it needed the Kedusha, the Neshoma from Hashem. That is why the days prior to the inauguration it just couldn’t stand so Moshe had to dismantle it. The same is true with the world at large. Hashem created the world in six days, the state of the world was that of a ‘golam’ until Shabbos came along and gave it its spark, its life- its kedusha and neshoma. The six days of the week would not be able to last if it were not for Shabbos that comes every Seventh day.
This is what the Medrish is comparing, the day of Shabbos when the world was complete- which was the day that gave it the possibility to go on. To the Mishkan the day that it was complete- the First day of Nissin- gave it the power to stand.