The quote highlights the inherent chaos in human behavior, particularly when individuals are isolated. It suggests that actions taken in solitude may lack the structure and logic that typically accompany social interactions. When people are alone, they often act on impulse or emotion, which can lead to decisions that don't follow a rational pattern. This observation reflects the complexity of the human psyche and the unpredictable nature of individual choices.

In the context of Ian McEwan's "Atonement," this theme resonates with the characters who grapple with their inner thoughts and emotions. Their solo actions can be driven by feelings of guilt, longing, or desperation, illustrating that while some actions may seem illogical, they stem from profound personal experiences. Understanding this chaotic aspect of human behavior enriches our comprehension of the characters' motivations and the intricate narrative of atonement.