Haruki Murakami's "1Q84" delves into the complex nature of knowledge and its impact on human psyche. The quote "Certain kinds of knowledge rob people of their sleep" suggests that some truths or insights can create a heavy burden, leading to restlessness and anxiety. This reflects how awareness of certain realities can disrupt one's peace of mind and alter perceptions of the world.

Throughout the narrative, characters grapple with the weight of their experiences and the knowledge they possess. This theme underscores the idea that enlightenment is not always desirable; sometimes, ignorance can be a source of comfort. Murakami examines how such knowledge can haunt individuals, influencing their lives and decisions in profound ways.