Terumah - Why do we need a Mishkan and the Purim Connection

What are we trying to do? Put Hashem in a box? Sostrange as we quote the angels every day - Kadoshkadosh kadosh hashem sevaot - Malehkol haaretz kevodoh   Nevuchadnetzar, king of Babylon, who destroyed the first Bet Hamikdash, took all the 5,400 gold, silver and precious stone utensils and 180 treasure houses.    whose heart inspires him to generosity Heb. יִדְּבֶנּוּלִבּוֹ, an expression of נְדָבָה, which is an expression of goodwill, present in French, [a] gift.  you shall take My offering Our Rabbis said: [The word ךְתְּרוּמָה, mentioned three times, denotes that] three offerings are mentioned here. One is the offering of a beka [half-shekel] per head, from which they made the sockets, Anotheris the offering of a beka per head for the [community] coffers, from which to purchase the communal sacrifices,   And another is the offering for the Mishkan, each one’s [Israelite’s] donation (Talmud Yerushalmi, Shekalim 1:1;