Betzalel was inspired by HaShem every step of the way. Indeed, our great Rabbis of the Talmud tell us that in order to accomplish his mission of amazing Mishkan construction, Betzalel used the same letter combinations which HaShem used to create the world!
The Talmud also relates an interesting conversation between young Betzalel and Moshe:
HaShem instructed Moshe back in Parshas Terumah, “First build the Mishkan, then build the Aron, and finally build the other holy vessels.”
Moshe, however, reversed the order. He instructed Betzalel to first build the Aron and holy vessels, and lastly the Mishkan itself.
“Moshe Rabbeinu,” objected Betzalel, “doesn’t a person first build a house and afterwards bring in the furniture? If I were to first build the Aron and vessels, where would I store them?”
Betzalel then suggested to Moshe, “May I be brave enough to suggest that perhaps HaShem told you the opposite order; first the Mishkan and then the Aron and vessels.”
When Moshe heard Betzalel’s intelligent counter, he exclaimed, “You knew this all along. No wonder! You live up to your name, Betzalel, which also spells בְּצֵל אֵ-ל, in the shadow of HaShem!”