וְאֶל הָאָרֹן תִּתֵּן אֶת הָעֵדֻת אֲשֶׁר אֶתֵּן אֵלֶיךָ
Parashat Terumah is the first of five parashot, forming the last section of Sefer Shemot, which discuss the building of the Mishkan and the episode of the Golden Calf. These parashot are the setting of a famous argument between Rashi and Ramban regarding the timing of the Golden calf versus the command to build the Mishkan. Rashi, embracing the principle that the Torah prioritizes themes over chronology in terms of structure, says that the parashot of Terumah and Teztaveh belong after the episode of the Golden Calf, while Ramban consistently avoids use of this principle and so says that the parashot are in their correct chronological order. This debate affects the placement of the command to build the mishkan, placing it either before or after the Golden Calf. Rashi says that it comes afterwards, as Rashi sees the Mishkan as an atonement for the Golden Calf, while Ramban says that it comes before. However, their debate does not change purpose of the Mishkan. Determining the purpose of the Mishkan requires explaining why this series of parashot, start to finish, occurs here. If the command to build the Mishkan occurred after the Golden Calf, then why was it moved to its current location, just after the Revelation at Sinai? And if it occurred in its current location, then why was the command given here, just after the Revelation at Sinai?
Ramban says that the purpose of the Mishkan is to be the site of continuous revelation. It is a portable Mount Sinai. This is obvious not only from the verse, “And there I will meet with thee, and I will speak with thee from above the ark-cover, from between the two cherubim which are upon the ark of the testimony, of all things which I will give thee in commandment unto the children of Israel” (Shemot 25:22), but also from the various parallels between the Mishkan and Mount Sinai. ‘א descends on both of them in a cloud (Shemot 24:15-18 and 40:34-38). Each is divided into three sections; for the Mishkan it is the Hatzer, the Kodesh, and the Hodesh HaKedoshim; for Mount Sinai it was the foot of the mountain, the mountain itself, and the summit. Finally, the luchot are given on Mount Sinai, and from then on they rest in the Mishkan. Thus Ramban is undoubtedly correct, and while Rashi does not explain why he thinks the command to build the Mishkan was placed there, it is reasonable to assume that he would agree with Ramban on that point. However, the idea that the Mishkan will serve as the site of continuous revelation is only mentioned after the creation of the Aron and the Kaporet, the specific location from which ‘א would then speak to Moshe, and so seems to be a function of the Aron/Kaporet rather than the Mishkan. Moreover, this all seems both a little complex and unnecessary for the purposes of revelation. Not only would all the prophets after they enter the land get prophecy outside the Mishkan/Mikdash, Moshe himself has already done so many times. While Revelation occurs in the Mishkan, it is not a function of the Mishkan, nor is it dependent on it. What, then, is the purpose of the Mishkan?
The answer to this question is actually rather obvious, but it hardly clear. In the very beginning of the commands and instructions regarding building the Mishkan ‘א says, “And let them make Me a sanctuary, that I may dwell among them” (Shemot 25:8). Thus it would seem the purpose of the Mishkan is in order to enable ‘א to dwell amongst Bnei Yisrael. But how does it do that? ‘א is everywhere, so what good does building a tent do? The answer lies in the details of the Mishkan, all of which enable the fulfillment of its purpose.
The primary thing that Judaism says about ‘א, one of the few things agreed upon by all branches of Judaism, is that ‘א is one.The Mishkan expresses that in many ways, starting with the beautifully unitary structure of the Mishkan, especially the exact cube shape of the Kodesh HaKedoshim. More importantly, the text itself goes out of its way to emphasize this. “That the tabernacle may be one whole”(Shemot 26:6). “And couple the tent together, that it may be one”(Shemot 26:11). These and numerous other verses attest to the fact that the Mishkan was meant to embody the idea of ‘א’s oneness.
Another strong theme in the Mishkan is that of a graduated approach to Kedushah. In addition to the three-tiered breakdown of the area of the Mishkan into the Hatzer, the Kodesh, and the Kodesh HaKedoshim, the material structure of the Mishkan itself creates this delineation. The only metal used outside the Kodesh is copper, which is also used for the sockets for the entrance to the Kodesh, and for the clasps of the upper cloth covering the Kodesh. The sockets for the walls of the Kodesh and the entrance to the Kodesh HaKedoshim are silver. The clasps for the lower cloth covering the Kodesh are gold, along with all of the vessels in Kodesh. However, only the Aron HaEdut, in the Kodesh HaKedoshim, is covered in gold both inside and out. Thus the three zones are clearly delineated. This delineation emphasizes another very important idea about ‘א: His Kingship. A king by definition cannot just be approached by any person at any time. Specific people can approach the King, but even them only at specific times. Only the Kohen Gadol could enter the Kodesh HaKedoshim, and then only on Yom Kippur. This recognition of the absolute majesty of ‘א is an incredibly important idea. In the early centuries of the Common Era this idea made Jewish Merkabah mysticism unique among the various mystical trends in the world, emphasizing not the wondrous spiritual worlds one could explore, but rather the difficult and elaborate process of approaching the King of All Kings. This idea is central to the relationship of Man to ‘א, and it is built into the very physical structure of the Mishkan.
In opposition to these gradations is the relation of Bnei Yisrael to the Mishkan. It would be easy to read this gradation as a function of elitism on the part of the priests, reserving the close encounter with ‘א for themselves. However, the Mishkan in its function and its origin rejects this idea. When gathering the materials from which the Mishkan will be made, ‘א asks “of every man whose heart maketh him willing ye shall take My offering” (Shemot 25:2). The Mishkan is a product of the nation as a whole. In terms of function, not only is the Mishkan the place where all of Bnei Yisrael come to serve ‘א, even when Moshe would hear ‘א’s voice from the Kodesh HaKodeshim, one of the more exclusive occurrences in the Mishkan, the Torah specifically states that this was it would be for the sake of all Israel (Shemot 25:22). Not only does this mean that the graduated structure of the Mishkan was a matter of respect rather than elitism, it also demonstrates the importance of equality and connectivity in the Nation of Israel.
The entire Mishkan is built around the Aron. The concentric quadrilaterals get smaller and smaller, with the Aron being the final, inner-most, rectangle. This central position in any other temple would be occupied by the god of that temple, by the deity of the local people. In the Mishkan this position place is filled not by ‘א, but by His Word, and more specifically, by his Law. While ‘א’s voice would come to the Kaporet for Moshe to hear it, the main purpose of the Aron HaEdut was to hold the Luchot HaEdut, and thus these remained constantly at the heart of the Mishkan. When Moshe first writes out a complete Torah-scroll in Sefer Devarim it is put in the Aron (Devarim 31:26). The centrality of the Law here cannot be over emphasized. While the degree to which Judaism cares about the beliefs of individual Jews has been debated constantly throughout the centuries, the very fact that such a debate was possible tells you about how central the Law is. Only when the law take center stage can the necessity of beliefs be questioned. Few, however, have been the voices in the Jewish Tradition that argued for a total lack of inherent beliefs in Judaism, with perhaps the most famous being Moses Mendelssohn. The reason that the centrality of the Law never eradicated the Torah’s inherent beliefs is that the Law functions on a large scale the same way as all the minutia of the Mishkan. The same way the very fixings of the Mishkan all express greater ideas and beliefs, so too all of the details of the Law. ‘א’s Law is about living ideas in everyday life.
Judaism doesn’t care about beliefs in the abstract. If the Torah wanted simply to convey certain ideas, it could have written them down in a book and done away with the rules and the narratives. But a book of ideas cannot tell you about what it means to live in context of ‘א. Only the stories of those who lived in relation to him can do that. Only ‘א’s Law enables you to live ‘א and His values into your life. And perhaps this, more than anything, explains the reason the command for the Mishkan was given right after the Revelation at Sinai. At Sinai, Bnei Yisrael experienced this supremely powerful event. They experienced something that wasn’t just once-in-a-lifetime, it was once-in-history. The question that has to be asked after such an event is how do you keep it relevant? How do you turn that peak experience into a living reality every day of your life? You have to have a framework of actions that are based off of and express that experience. The Mishkan not only serves that purpose in terms of expressing individual ideas, it also expresses that most basic idea that underwrites all of Judaism from that moment on: ‘א dwells in the life of Man.
 For more on this debate, see R’ Menachem Leibtag’s thorough shiur on it here.
 In Hebrew: אין מוקדם ומאוחר בתורה
 He is unable to avoid it entirely, as Bamidbar 1 and Bamidbar 9 occur in the second and first months of the second year in the desert respectively. Rather he simply minimizes it as much as possible.
 Translations from mechon-mamre.org
 Menachem Leibtag, ibid.
 Gershom Scholem, Major Trends in Jewish Mysticism, Ch. 1