The conclusion of the ceremony renewing the Temple service marked a moment of profound surprise and joy. After generations of neglect, particularly during the time when the house of God was abandoned under Ahaz, the people finally witnessed the dawn of a new era dedicated to restoring His service [ביאור שטיינזלץ]. The overwhelming emotion of the day was rooted in the deep recognition of what God Himself had prepared [רד״ק].
The primary approach among commentators is that God prepared and guided the hearts of the people, sparking a spiritual awakening that inspired them to participate and fulfill His will [רש״י, ביאור שטיינזלץ]. Building on this idea, some explain that God did not merely purify their hearts but also provided the massive number of sacrifices required for the celebration [מלבי״ם]. Another perspective suggests that the divine preparation was evident in the flawless organization of the day, as God ensured that every detail unfolded in perfect order [מצודת דוד].
What truly amplified the joy of Hezekiah and the nation was the sheer speed of this transformation. The wave of repentance and the return to God took place almost overnight, during the very first year of Hezekiah's reign [רש״י]. Because this monumental shift occurred without any prior planning on the part of the people, they realized that such a rapid change could only be a divine awakening initiated from above [מלבי״ם]. Despite the complete suddenness of the event, the nation stood in awe of how flawlessly and smoothly everything was executed [מצודת דוד].