Philosophy Between the LinesPhilosophical esotericism the practice of communicating one's unorthodox thoughts "between the lines" was a common practice until the end of the eighteenth century. The famous Encyclopdie of Diderot, for instance, not only discusses this practice in over twenty different articles, but admits to employing it itself. The history of Western thought contains hundreds of such statements by major philosophers testifying to the use of esoteric writing in