In "A Solitary Blue" by Cynthia Voigt, the protagonist feels a profound sense of isolation and disconnection from the world around him. This emotional distance leads him to the feeling that he exists like a ghost, unnoticed and unacknowledged in his own life. He wanders through various spaces without truly belonging, highlighting the struggles of being unheard and unseen in a tumultuous environment.

The metaphor of being a ghost emphasizes the character's deep yearning for connection and understanding. It portrays the emotional turmoil of feeling invisible in relationships and emphasizes the importance of finding one's identity and place in the world amidst challenges and solitude.