"Then the family heads of Judah and Benjamin, and the priests and Levites--everyone whose heart God had moved--prepared to go up and build the house of the LORD in Jerusalem."
There was a new generation of Jews rising up when all had been scattered and were living in exile 400 some years. Under the royal charge and funding of Cyrus, king of Persia, to build the temple of the LORD, all Jews were charged to go back to Jerusalem to rebuild the temple. However, many of them had already forgotten the ways of the fathers and were quite comfortable living in exile. They wanted to live like the world and give up the traditions of their fathers and the history of their people. They wanted to forget all about the LORD.
But this new generation did not start a new thing, but they revived the old. The LORD stirred up their hearts and moved them and they went back to a life they did not know in a land most of them had never been having been born in exile. All they had were the legends their fathers told but the LORD worked in them to will and to do in order to restore what was.
So too does this generation quickly want to abandon the ways of their fathers to do more newer, cutting-edge, and relevant things, not realizing progress lies not in going forward but in going back to the way things were in the beginning.