How do we know the joy in dedication was genuine according to the Bible?

In Ezra 6:16, we find that the Israelites dedicated the temple with joy, a celebration marked not only by their hard work but also by the sovereign blessing of God. This joy was not manufactured but was genuinely inspired by the completion of the temple, a symbol of God's presence among His people. Their ability to rejoice after a long period of oppression and captivity indicates a profound transformation. In Psalm 137, we see a contrast; while in Babylon, they wept, but now, back in their land and in the presence of God, they rejoiced. Their joy stemmed from the faithfulness of God to His promises, as He had turned their mourning into gladness.