In "The Unbearable Lightness of Being," Milan Kundera explores the concept of "poetic memory," a unique part of the brain that captures experiences and moments that evoke beauty and enchantment in our lives. This part of memory holds significant emotional value, preserving impressions that shape our understanding of love and existence. Kundera suggests that these memories are essential to defining the moments that make life rich and meaningful.

The narrative centers on Thomas and his relationship with Teresa, indicating that since their union, Thomas has become emotionally anchored, making it impossible for him to let other women hold any meaningful place in his memory. Teresa has effectively claimed this "poetic memory," rendering past relationships insignificant in comparison to the emotional depth he experiences with her. This highlights the profound impact of true love on one's perception and the memory of romantic connections.