José Ortega y Gasset Quote

He [the "specialist"] is one who, out of all that has to be known in order to be a man of judgment, is only acquainted with one science, and even of that one only knows the small corner in which he is an active investigator. He even proclaims it as a virtue that he takes no cognisance of what lies outside the narrow territory specially cultivated by himself, and gives the name of "dilettantism" to any curiosity for the general scheme of knowledge.

Chapter XII: The Barbarism Of "Specialisation" - The Revolt of the Masses (1929)