The chest, on that day of moving, had been set in the new attic, which was smaller than the other, and less frightening, perhaps because gaps in the cedar-shingled roof let dabs of daylight in. When the roof was being repaired, the whole space was thrown open to the weather. This is the answer.
Explanation:
The mood shifts markedly by the conclusion of Edward's speech because he wishes to take his followers home with plenty of encouragement in their hearts. That's why, towards the end of this address, he holds out the hope of repentance to his community if only they switch from the lifetime of suffering and return to the road of justice.