BESURAS HAGEULO:

Chapter 67

In our generation - the last generation of exile and the first generation of Redemption - after all the requirements have already been completed, and it only remains to actually greet our righteous Moshiach, it is certain that G-d will bless every Jew with golden riches, materially and spiritually. [This blessing] will be such that (as it was "in the days of your going forth from the land of Egypt" and will be now that "I will show him wonders"¹) "every single Jew will have no less than ninety Libyan donkeys with him loaded with the wealth and gold of Egypt."²

This is in order that one should use the wealth ("gold and silver and copper") to make of one's own home a Sanctuary and Temple to G-d (and I will dwell among them, within each and every individual). This is also done through giving tzedekah to build synagogues and Houses of Study in the simple sense, "a small sanctuary."³

Further, and this is the currently essential requirement, the third Beis HaMikdash [Temple] must be built in simple reality:

After all the explanations of the verse "Make me a Sanctuary and I will dwell among them," including the explanation "within each and every individual," a Torah verse does not leave its simple meaning.⁴ First and foremost the practical legal meaning of this text is that Jews have the obligation to build the Beis HaMikdash.

In regard to us, this means to build the third Beis HaMikdash, in simple reality, according to the ruling of the Rambam,⁵ that it will be built through our righteous Moshiach, "And he will build the Temple in its place."⁶ The Rambam stated,⁷ "Everyone is obligated to build and assist, with their own efforts and with their money, men, women and children, as with the Sanctuary in the wilderness." It's obvious that this is also relevant to the third Temple, that every Jew should participate through his contributions, men and women, and it may be suggested that even children (as it was with the gifts to the Tabernacle).

(From the talk of Wednesday night, Thursday, Friday
and Shabbos Kodesh, Parshas Terumah, 5752) 

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1. Micha 7:15.

2. Bechoros 5b. And also in Tanchuma Beshalach 25. Cited by Rashi, Bo 13:13 (See Likkutei Sichos, vol. 16, p. 253, note 20*).

3. Yechezkel 11:16. Megillah 29a.

4. Shabbos 63:1. See there for cross references.

5. Laws of Kings, beginning of chapter 11 and its end. See Likkutei Sichos vol. 18, p.418 ff. See there for cross references.

6. The expression of the Rambam there, end of chapter 11.

7. Laws of the Temple (Hilchos Beis HaBechirah), chapter 1, halacha 12.