The [airplane’s] windscreen splits and pops out of its frame, the snapped edge taking [the pilot’s] head clean off.
-- Narration (chapter 1)

Importance: This line of narration describes the first moments of impact during the plane crash. The descriptions are sudden and gruesome, thereby emphasizing the abrupt and catastrophic nature of the tragedy. This suddenness parallels the abrupt shift in narrative focus, as Maja's death quickly shifts her from a central character to a deceased relic of this opening scene.

...in some obscure way, Angelica is her mother...
-- Narration (chapter 2)

Importance: This line of narration pertains to Philippe's mental and emotional degradation in the years following Maja's death. His state of mind becomes twisted such that he believes, on some subconscious level, that Angelica and Maja are the same person. These dynamics contribute to the sexual abuse that Philippe inflicts upon his daughter over the years.

Only as she gets older is there a growing...
-- Narration (chapter 2)