Quote by Susan Sontag: “Illness is the night‑side of life, a more onerous citizenship.”

Being ill places you in a different world from healthy people — with its own demands, language, and suffering. Sontag is saying that the ill occupy a parallel reality that the healthy rarely acknowledge, and that living with illness requires a kind of endurance most people never have to learn.

Sontag wrote Illness as Metaphor in 1978 after her own diagnosis with breast cancer. The book argued that metaphors attached to illness — particularly cancer and tuberculosis — caused additional suffering by implying that patients were morally or psychologically responsible for their conditions.

American writer, filmmaker, and cultural critic whose essays on photography, illness, and representation transformed how intellectuals engaged with visual culture and media. Her 1977 book On Photography and 1978 work Illness as Metaphor are among the most influential critical works of the twentieth century.