"Man Is Condemned to Be Free"
Sartre held that human beings have no innate, predestined nature by which to escape the responsibility of choice — "man is free, man is freedom itself… man is condemned to be free." Even to choose not to choose is itself a choice, and one can never escape bearing responsibility for one’s own existence.
Declining the Nobel Prize in Literature
In 1964 Sartre was awarded the Nobel Prize in Literature but actively wrote to the Swedish Academy to decline it, on the grounds that a writer should not let himself be institutionalized and alienated by any institutional system of honors — a stance highly consistent with the existentialist philosophy he always stressed of individual free choice and refusal to be defined by external authority.