Teresa returned to sleep again. But he could not sleep. He imagined her dead and sees terrible dreams. He could not wake her because she was dead. Yes, this is death: Teresa sleeps and sees terrible dreams without being able to wake her.
In "The Unbearable Lightness of Being," Teresa attempts to return to sleep, but her partner is unable to join her in rest. He is haunted by dark thoughts and nightmares, fixating on the idea of her death. This fixation illustrates his fear of losing her and the helplessness that accompanies such thoughts.
The narrative explores the profound impact of these dreams, suggesting that Teresa's sleep is akin to a permanent state of death for him. Her inability to wake, coupled with his dreadful visions, symbolizes the deep emotional turmoil and existential dread he experiences in their relationship.