Only what has in itself the end of its existence only the human being that is able himself to determine his ends by reason, or, Models of taste with respect to the arts of speech must be composed in a dead and learned language; the first, to prevent their having to suffer the changes that inevitably overtake living ones, making dignified expressions become degraded, common ones antiquated, and ones newly created after a short period of time obsolete; the second to ensure its having a grammar that is not subject to the caprices of fashion, but has fixed rules of its own.