Conversation is a traffick; and if you enter into it, without some stock of knowledge, to ballance the account perpetually betwixtyou,--the trade drops at once: and this is the reasonwhy travellers have so little [good] conversation with natives,--owing to their [the natives'] suspicionthat there is nothing to be extracted from the conversationworth the trouble of their bad language.

Sermons (ed. 1788)