Mansfield Park by Jane Austen Chapter 5 Page 14

“And yet, in general, nothing can be more easily ascertained.

The distinction is so broad. Manners as well as appearance are, generally speaking, so totally different. Till now, I could not have supposed it possible to be mistaken as to a girl's being out or not. A girl not out has always the same sort of dress: a close bonnet, for instance; looks very demure, and never says a word. You may smile, but it is so, I assure you; and except that it is sometimes carried a little too far, it is all very proper. Girls should be quiet and modest. The most objectionable part is, that the alteration of manners on being introduced into company is frequently too sudden. They sometimes pass in such very little time from reserve to quite the opposite — to confidence! That is the faulty part of the present system.