F. Max Müller,
Lectures on the Science of Language
“ No ancient Greek ever thought of learning a foreign language. Why should he? He divided the whole world into Greeks and Barbarians, and he would have felt himself degraded by adopting either the dress or the manners or the language of his barbarian neighbors. He considered it a privilege to speak Greek, and even dialects closely related to his own, were treated by him as mere jargons. It takes time before people conceive the idea that it is possible to express oneself in any but one's own language. ”
