Our Parsha opens with the Mitzvah of Shabbat. The question is "why?" What do I mean? Well, the Jews have already been commanded to keep Shabbat, not once but on FOUR different occasions in the Book of Exodus1. Why would a further time be necessary?
THE MITZVA OF SHABBAT
Shabbat is a mitzvah that is basic and fundamental to everything that Judaism stands for. After all, Shabbat straddles the divide between the world of Bein Adam LaMakom and the world of Bein Adam Lechavero.
On the one hand Shabbat is a symbol of God's creation of the world:
"For six days God made the heavens and earth, the sea and all that is in it and rested on the seventh day." (Shemot 20:11)
On the Other hand Shabbat is rooted in the experience of the Exodus and acts as a symbol of freedom, a day on which all of God's creations engage in rest:
"Six days you shall labour and do all your work, but the seventh day is a sabbath of the Lord your God, you shall not do any work - you, your son or your daughter, your male and female slave, your ox or your ass, or any of your cattle ... Remember that you were a slave in the land of Egypt and the Lord your God freed you from there with a mighty hand ... therefore the Lord your God has commanded you to observe the Sabbath day." (Devarim 5:13-15)
SHABBAT - MISHKAN.
But we have been reading with the topic of the Mishkan in recent weeks. We cannot help but observe an unusual but consistent connection between Shabbat and the Mishkan. This linkage emerges in three very clear ways:
i. Explicitly through the pesukim in the Torah
ii. The structure of the parshiot
iii. The Halakhic definition of Shabbat.
I. PESUKIM IN THE TORAH
As we have noted, Shabbat appears in a variety of contexts in Torah. But there are certain places where Shabbat and Mishkan (or mikdash) are deliberately interlinked:
"You shall keep my Sabbaths and venerate my Mikdash, I am the Lord." (Vayikra 19:30)
And this is repeated in Vayikra 26:2:
"You shall keep my Sabbaths and venerate my Mikdash"
One wonders, why is it so natural for the Torah to twin Mishkan and Shabbat? Where lies the affinity between the two?
II. THE STRUCTURE OF THE PARSHIOT
The parshiot of the Mishkan are structure in the following way:
The command to build the Mishkan
Egel Hazahav and the subsequent renewal of the covenant
Moses's command and the construction of the Mishkan.
There is an interesting symmetrical structure (called by academics, a chiastic structure: a-b-c-b-a) It places the Mishkan at the extremes, then Shabbat; and in the centre, the story of the Egel. It is beyond the scope of this shiur to discuss the relationship between the egel and the Mishkan2. But what is Shabbat doing here? Why is Shabbat so intimately connected to the story of the Mishkan3? There must be some link!
III. THE HALAKHIC DEFINITION OF SHABBAT. Here is really one of the most interesting of connections. Our parsha begins:
"Six days do melacha (work) and the seventh day shall be for you holy, a Shabbat Shabbaton for God; whoever does melacha (work) shall be put to death. Do not burn fire in all your habitations on the Shabbat day." [Exodus 35:2-3]
We may reduce these verses to two central ideas:
1) a prohibition against a certain type of work, called "melacha", and
2) a prohibition against the use of fire.
Some questions arise immediately: What is "melacha"? Why is fire excluded from the category of "melacha" and mentioned separately?
The Talmud notes that the word "melacha" is a most critical word in the Torah section that describes the construction of the Mishkan! [for example 35:21, 35:31, 35:33, 35:35, 36:1, 36:2, 36:3, 36:4, 36:5, 36:6, 36:7, 36:8] Likewise the word "Melacha" is the key phrase when Moses teaches the laws of Shabbat observance. In fact the Gemara in Masechet Shabbat deduces the number 39 for the 39 melakhot on Shabbat from the 39 occurrences of the word "Melakha" in the story of the Mishkan!
The close linguistic connection and creates a linkage, a "word-play" that suggests a deep relationship between Shabbat and the Mishkan. Out of all the possible options for defining the term "melacha" the Mishkan seems to be an obvious candidate.
Chazal took things a step further and applied the Shabbat-Mishkan connection to the TYPES of construction work performed in the Mishkan. Hence, the legal definition of carrying on Shabbat, writing, cooking, weaving etc. all take their initial legalistic definition based upon the Mishkan. In a word, the melacha prohibited on Shabbat is the very same melacha used in constructing the Mishkan.
So, now, from three perspectives, we have reinforced the connection between Mishkan and Shabbat. We have to understand the source of this connection.
MISHKAN - CREATION
We know that Shabbat is linked to creation. As we mentioned in our opening lines, the first Shabbat WAS the Shabbat of creation, when God rested after six days. Shabbat is brought in the Torah with the explicit aim of reminding us of creation God says:
"It shall be a sign for all time between me and the people of Israel, that in six days the Lord made heaven and earth and on the seventh day, he ceased from work .." (31:17)
But there is likewise, a linkage between Mishkan and creation. This link is more subtle, but it is reinforced through textual parallel and through midrashic themes. In a minute, we will develop these themes, but at this stage , let us simply note that if these connections are true, we have an interesting triad of themes, or rather a connecting cycle of themes:
CREATION - SHABBAT - MISHKAN - CREATION
We have an ongoing circle of interconnected ideas. Let us first establish the MISHKAN-CREATION link and then we will have to move on to a further stage; the question of significance. (If you want to read an excellent article on this topic, which I have used in my preparation for this shiur, see Nehama Leibowitz on Parshat Teruma, "Make me a sanctuary for me to dwell in." (the second article) see pg. 475-483)
1. CHOCHMA, TEVUNA , DAAT : Midrash Pirke d'Rabbi Eliezer 3
"In ten sayings the world was created .. and in three it was finalised. And these are they: Chochma, Tevuna and Da'at; as it is stated: 'The Lord in Chochma founded the earth, by Tevuna established the heavens, by his Da'at the depths were split asunder.' (Mishlei / Proverbs 3:19-20) With the same three, the Mishkan was made, as it states (about Betzalel the craftsman for the Mishkan): 'I have filled him with the spirit of God, in Chokhma, Tevuna and Da'at.' (Shemot 31:3) With the same three qualities the Temple was built; 'His mother was from Naftali, his father from Tyre, and he was filled with Chochma, tevuna and Da'at.' (I Melachim 7:14)"
The implication here is quite clear. The qualities of building the Mishkan are the same qualities with which the world was created. Or maybe we can rephrase that. The creative power needed for the Mishkan is identical to the God's creative power. There is some creativity in the Mishkan which is the same as that of the creation of the world.
2. TEXTUAL PARALLELS:
a. The root "A-SS-A"
The root "A-SS-A" and more specifically the word "Vaya'as" - and he made, is used throughout the creation chapter (see 1:7,16,25) and is also mentioned over 200 times (!) in the "making" of the Mishkan.
b. The phrases of completion in both events are identical: ."The heavens and earth were FINISHED (veyechulu hashamayim ve'ha'aretz) ... and God FINISHED his WORK which he had made. " (Bereshit 2"1-2)
Likewise with the Mishkan:
"Thus was FINISHED all the WORK of the tabernacle of the tent of meeting ... and Moses FINISHED the work." (Shemot 39:32-40:33)
c. Here is a third literary parallel. God observes his work and remarks upon it that it conforms to plan. God does this seven times in Bereshit, proclaiming that the world is "good" or "very good."
"And God SAW everything that he had made and BEHOLD it was very good, And God BLESSED the seventh day" (Bereshit 1,31. 2,3)
likewise with the Mishkan, Moshe also observes and comments upon the work of the Mishkan. He cannot claim that it is "very good". Instead he comments that it is exactly according to God's plan.
"And Moses SAW all the work, and BEHOLD they had done it as the Lord had commanded ... and Moses blessed them." (Shemot 39:43)
FINISHING GOD'S CREATION
What are the meanings of these parallels? What is the nature of the MISHKAN -CREATION ; SHABBAT - MISHKAN link?
Maybe we can suggest the following idea. God in six days created the world. He created a world that was built from mineral, vegetable and animal elements. At the pinnacle of it all is man. Man created in God's image is placed in the world with a certain responsibility. Man is told that he is to "work and protect" the world. How does man do this? What is man's role in the world?
An interesting Midrash raises a possibility:
"A statement of Reish Lakish ... God told Israel; if you accept the Torah, all well and good. But if you do not, I will revert the world to chaos ("Tohu VaVohu" - see Bereshit 1:2)" (Shabbat 68a)
This Talmudic Midrash proposes a fundamental principle. It would seem that the very existence of the world is dependent upon Israel's acceptance of Torah! The world before its creation is described as Tohu Vavohu. If the Torah is not accepted by Am Yisrael, God is simply going to re-boot the system, wiping out the entire history of the universe. Why? What can this mean?
To explain, let us suggests that the world is created for a reason. The aim of creation is that it be infused with spirituality, with Godliness. And the Torah embodies that Godliness. God says; If Israel will not accept the Torah, then we might as well end the entire enterprise that we call planet earth. Why? Because Israel are being given the opportunity to inject the spirit into the material world. If they refuse, then the entire plan collapses.
Here is the beginning of the answer about the Mishkan-creation link. The act of bringing spirituality into the world, is the ultimate gesture of creation, for in essence, it constitutes the mission, the mandate of spiritualising the world. It gives the world its "higher" purpose. When Israel accept Torah, they bring the creation a step forward.
Following this logic, the Mishkan also begins to take shape. The Mishkan is an enterprise whereby human beings establish a place for God on earth. With all the philosophical inconsistencies contained in this concept,  we are talking about an entity which gives God a foothold on Earth (so to speak!) - "Make for me a sanctuary and I will dwell in their midst."(Shemot 25:7) . This act of bringing God into the world is the ultimate expression of our "completion" of the creation. It is creative act in that the presence of God is now intensified and may some day dominates our world . Simply put, the establishment of the Mishkan, continues the process of creation 2000 years earlier. The work of infusing the world with the spirit, is its creation. The physical work of creation has been done, but God expects man to do the rest of the work - the spiritual element.
It is interesting how the ideas escalate here.
Shabbat is the spiritual culmination of creation; a TIME for God after the physical creation. The Mishkan is a PLACE for God and spirituality within the physical world. It to is created from mineral, vegetable and animal elements and it houses the presence of God. The chiddush is that our act of erecting the Mishkan, is the continuation of creation. In fact, it is the perfection of creation.
THE CONCEPT OF TZIMTZUM.
Many of you may have some basic familiarity with the Kabbalistic concept of Tzimtzum - the contraction of God's presence. The theory may be stated something like this:
God, prior to the existence of the world, filled everything. God was everything! But if God is everywhere, then is there room for a world? Where can the world exist? Gd fills everything! And so, Kabbala says that God pulled himself back, he receded, withdrew. In order to create a space that is "not God", God so to speak, pulled back and fashioned a space that allowed a physical, imperfect, non-holy, non-Godly creation to come into existence. This contraction is Tzimtzum. God makes space for the world to exist.
But on Shabbat, God re-enters the world. Why? Because on Shabbat, humans stop being creative! On Shabbat, we stop acting as creators and we surrender our rights to utilise the raw materials in the world to further our civilization, our mastery and control. We surrender our rights of creativity to God, the Ultimate Creator. In that way, on Shabbat, we invite God back into the world. In Kabbalat Shabbat, we do not only welcome Shabbat, we welcome God's overwhelming intensity, to flood into a world, which he has "made room " for by his own self-contraction. We let the world return to total Godliness!
HAR SINAI AND THE MISHKAN
How does all this relate to the Mishkan? On a basic level, I would say that, in the same way in which Shabbat invites God to rejoin our world, the Mishkan too invites God to join man. It makes "space" for God's intense presence upon earth.
Look at the way our parasha closes:
"The CLOUD covered the tent of meeting, and GOD'S PRESENCE filled the Mishkan. And Moses could not enter the tent of meeting for the cloud rested upon it, and the presence of God filled the Mishkan... AND GOD CALLED TO HIM.." (40:34-5 and Vayikra 1:1)
The Mishkan is an everyday event. God's presence is manifest in the Mishkan at all times.
Now our strands fit together. Just like Shabbat is a process of bringing God back into the world, the Mishkan brings God back into the world.
But in essence, this is the ultimate act of creation. God, who made a world in which he is absent, looks to man to call upon the name of God. In the Mishkan, we perfect the creation by bringing God back into the world.
 Does God need a home? Can a physical structure contain God? - see Shlomo's Tefilla in I Kings 8:27
 See for example Isaiah 2:1-5
1 16:23, 20:7-10, 23:12, 31:13-17. This, in addition to the teaching at Marah [15:25] where according to Midrash we learn that the Jews were also commanded to keep Shabbat. [See Sanhedrin 56a, Rashi 24:3.]
2 We probably all know the basic theories: either the Mishkan is a Kappara (atonement) for the egel, or possible a spiritual response to the religious failure of the egel,
3 We might raise a suggestion, that Shabbat is connected to the egel story and not to the Mishkan. After all, if Shabbat is about belief in God, and the egel is about idolatry, then Shabbat would seem an appropriate mitzva to place surrounding the egel story. I shall go in a different direction however, and see Shabbat as connected more to the Mishkan aspect of the order of parshiot (semikhat parshiot) than the egel.