In "The Paradox of the Actor," Diderot broadly examines theater, scrutinizing the enigmatic figure of the actor.

The actor is constantly haunted by a loss of identity, as he is compelled to be recognized through other figures.

For the French philosopher, this knowledge of the actor, based on which he renounces himself, relates to the paradoxical ability of the actor to be insensitive, renouncing not only himself but also his emotions.