R. Brumbach on Parashat Terumah:
The Sanctuary represents Israel’s obligation to sanctify itself in its personal life. When the nation carries out that primary responsibility, G-d responds by dwelling among them.
G-d has always desired to tabernacle among His people. And the purpose of the Mishkanwas to be a constant reminder of G-d’s presence residing among the Jewish people. The mishkan represents G-d’s shechinah (from the same word as mishkan) – G-d’s manifest presence on earth.