ויקם משה את המשכן... וישם את מכסה האהל עליו מלמעלה כאשר צוה ד' את משה
Moshe Rabbeinu was the one who raised the Mishkan, assembling it in accordance with Hashem’s command. Betzalel was the architect of the Mishkan, preparing its parts and vessels, so that Moshe could erect it. Why Moshe? Why not Betzalel? Why not Aharon? It is not as if they did not have a vested interest in seeing the finished product. To Betzalel, it would mean that he had carried out Hashem’s Will to build the Mishkan in order to atone for the sin of the Golden Calf, during which his grandfather had been murdered. Aharon HaKohen played a role in the creation…