And whatever the passengers’ destination, whether they are frightened and safe, or dead, they will have arrived by now.
-- Narration (chapter 1)

Importance: This line of narration reflects some of Henry's thoughts after he sees a burning plane heading towards the airport. Henry believes that it may be a terrorist attack that has resulted in much carnage. This fear reflects the sociopolitical anxieties of the novel's specific historical setting, specifically in early 2003.

It’s a commonplace of parenting and modern genetics that parents have little or no influence on the characters of their children.
-- Narration (chapter 1)

Importance: This line of narration emphasizes the inherent distinctions between parents and their children. Henry has accepted these distinctions in his on life, as his children's interests are quite different from his. Nonetheless, he makes strides to nurture his relationships with his children by honoring and respecting their goals and passions.

When [Henry] thinks of sex, he thinks of [Rosalind]…In...
-- Narration (chapter 1)