It is explained that Korach’s desires reflected the spiritual heights to be reached in the Era of the Redemption. Then the Levites (Korach’s tribe) will be elevated to the station of priests.
The rewards of that age cannot, however, be attained prematurely, but only as a result of our Divine service. It is only through our selfless devotion to the Torah of Moshe and the directives of “the extension of Moshe in every generation,” the Torah leaders of our people, that we can elevate ourselves and the world to the point that “the world will be filled with the knowledge of G‑d.”