4 ideas
Hellgum, a preacher returning from Chicago, wins a group of Dalarna farmers to a strict revivalist fellowship. The episode is loosely based on the real 1896 emigration of Nås parishioners to the American Colony in Jerusalem.
The Ingmarsson men decide hard questions by imagining a conversation with their dead father in heaven and asking what 'walking in God's ways' requires. Lineage becomes a conscience: the imagined judgment of the dead pushes choices past personal pride or custom and toward what the family's accumulated righteousness would demand. This is how Ingmar resolves to fetch Brita from prison after she killed their infant, taking public shame on himself.
Young Ingmar breaks his engagement to Gertrud and marries the wealthy Barbro so he can buy back the family farm lost in the emigration. The novel treats the farm as a moral trust binding the parish together, not as property, so keeping it justifies a painful personal sacrifice. It also shows the cost: the abandoned Gertrud is driven into religious delusion.
A revival that defines true faith as separation from the unconverted splits a parish along household lines. Converts cut ties with spouses, parents and neighbors who stay behind, and they treat that estrangement as proof of their holiness. The fervor that promises communion therefore produces fracture, because the fellowship's boundary is drawn through existing families.