Moreover all the children of Israel saw the fire coming down, and the glory of the Lord upon the house: and falling down with their faces to the ground, upon the stone pavement, they adored and praised the Lord: because he is good, because his mercy endureth for ever.
2 Chronicles 7:1 And when Solomon had made an end of his prayer, fire came down from heaven, and consumed the holocausts and the victims: and the majesty of the Lord filled the house.
2 Chronicles 7:2 Neither could the priests enter into the temple of the Lord, because the majesty of the Lord had filled the temple of the Lord.
2 Chronicles 7:3 Moreover all the children of Israel saw the fire coming down, and the glory of the Lord upon the house: and falling down with their faces to the ground, upon the stone pavement, they adored and praised the Lord: because he is good, because his mercy endureth for ever.
2 Chronicles 7:4 And the king and all the people sacrificed victims before the Lord.
2 Chronicles 7:5 And king Solomon offered a sacrifice of twenty-two thousand oxen, and one hundred and twenty thousand rams: and the king and all the people dedicated the house of God.
The verse centers on "mercy", "moreover", "children", "israel", "fire", "coming", "down", and "glory". It is saying that the verse draws attention to "mercy" and "moreover", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 2's "Neither could the priests enter into the..." into verse 4's "And the king and all the people...", so "mercy" and "moreover" belong inside that flow. In 2 Chronicles context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "mercy" and "moreover" with trust shaped by these words, not by a vague optimism outside the passage.