Books
Human nature is so well disposed towards those who are in interesting situations, that a young person, who either marries or dies, is sure of being kindly spoken of.
— Jane Austen ‧ Emma

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
People, this says, warm up quickly to anyone caught in an interesting situation. A young person who marries or dies is sure to be spoken of kindly. It's a dry, slightly mocking observation that goodwill often follows drama and circumstance rather than careful judgment.
Context reviewed