A linguistic system is a series of differences of sound combined with a series of differences of ideas...
Ferdinand de SaussureThe business, task or object of the scientific study of languages will if possible be 1) to trace the history of all known languages. Naturally this is possible only to a very limited extent and for very few languages.
Ferdinand de SaussureWithin speech, words are subject to a kind of relation that is independent of the first and based on their linkage: these are syntagmatic relations, of which I have spoken.
Ferdinand de Saussure