What does Haggai 2:11 mean?

The silver is mine, and the gold is mine,’ says Yahweh of Armies.

‘The latter glory of this house will be greater than the former,’ says Yahweh of Armies; ‘and in this place will I give peace,’ says Yahweh of Armies.”

In the twenty-fourth day of the ninth month, in the second year of Darius, Yahweh’s word came by Haggai the prophet, saying,

‘If someone carries holy meat in the fold of his garment, and with his fold touches bread, stew, wine, oil, or any food, will it become holy?’” The priests answered, “No.”

Then Haggai said, “If one who is unclean by reason of a dead body touch any of these, will it be unclean?” The priests answered, “It will be unclean.”

Then Haggai answered, “‘So is this people, and so is this nation before me,’ says Yahweh; ‘and so is every work of their hands. That which they offer there is unclean.