Abstract: This study intends to deal with the work of Raymond Roussel in the light of the studies of Michel Foucault. Among the main themes, we define the concept of the labyrinth linked to that of interpretation in order to understand how Roussel constantly seeks a plural truth. Secondly, we tried to define the role of language as a founding threshold between the simulacrum and reality; the reference to thresholds that are always cyclical, indicates that true and false are mobile categories and the language has the task of digging both in depth and horizontally along the surface of things.