The quote reflects the theme of the fragility of familial bonds and how easily they can be overlooked. In Ian McEwan's "Atonement," the narrative explores how everyday moments of affection can fade into the background, especially when overshadowed by conflict or misunderstanding. The characters in the story often take their connections for granted, illustrating a common human tendency to forget the love that exists within families.

This notion illustrates the interplay between love and neglect, demonstrating that even the strongest relationships can suffer from moments of unawareness. The characters' experiences serve as a poignant reminder that appreciation for familial love must be actively nurtured, or it risks being forgotten amidst life's complexities. McEwan invites readers to reflect on their own relationships and the importance of recognizing and cherishing familial love.