No important national language, at least in the Occidental world, has complete regularity of grammatical structure, nor is there a single logical category which is adequately and consistently handled in terms of linguistic symbolism. Edward Sapir
So far as the advocates of a constructed international language are concerned, it is rather to be wondered at how much in common their proposals actually have, both in vocabulary and in general spirit of procedure. Edward Sapir
The attitude of independence toward a constructed language which all national speakers must adopt is really a great advantage, because it tends to make man see himself as the master of language instead of its obedient servant. Edward Sapir
The modern mind tends to be more and more critical and analytical in spirit, hence it must devise for itself an engine of expression which is logically defensible at every point and which tends to correspond to the rigorous spirit of modern science. Edward Sapir
The psychology of a language which, in one way or another, is imposed upon one because of factors beyond one's control, is very different from the psychology of a language which one accepts of one's free will. Edward Sapir
The spirit of logical analysis should in practice blend with the practical pressure for the adoption of some form of international language, but it should not allow itself to be stampeded by it. Edward Sapir
The supposed inferiority of a constructed language to a national one on the score of richness of connotation is, of course, no criticism of the idea of a constructed language. Edward Sapir
These examples of the lack of simplicity in English and French, all appearances to the contrary, could be multiplied almost without limit and apply to all national languages. Edward Sapir
We see and hear and otherwise experience very largely as we do because the language habits of our community predispose certain choices of interpretation. Edward Sapir
