Human beings do not live in the objective world alone, nor alone in the world of social activity as ordinarily understood, but are very much at the mercy of the particular language which has become the medium of expression for their society.
More Edward Sapir quotes :
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
A firm, for instance, that does business in many countries of the world is driven to spend an enormous amount of time, labour, and money in providing for translation services.Edward Sapir
It is quite an illusion to imagine that one adjusts to reality essentially without the use of language and that language is merely an incidental means of solving specific problems of communication or reflection.Edward Sapir