Final answer:
Victor swears to confront painful truths and overcome negative emotions about the past for a better future with Bess, after experiencing a crucial moment of self-reflection at the cemetery where his family is buried.
Step-by-step explanation:
It appears that the narrative context of the question refers to Victor experiencing a significant emotional and moral turning point at the cemetery amid his family's graves. Victor resolves to confront the painful truths of his past and to overcome destructive emotions to ensure a better future for himself and Bess, the woman he deeply loves.
Determined, Victor swears that he will ascertain the full extent of Bess's previous relationship with a character named Oldring to extinguish his own doubts and jealousies. This decision is part of Victor's internal struggle and eventual triumph over his personal demons, illustrating his growth and commitment.