Sense and Sensibility by Jane Austen Chapter 17 Page 10

said Elinor; “I should hardly call her a lively girl — she is very earnest, very eager in all she does — sometimes talks a great deal and always with animation — but she is not often really merry.”

“I believe you are right,” he replied, “and yet I have always set her down as a lively girl.”

“I have frequently detected myself in such kind of mistakes,” said Elinor, “in a total misapprehension of character in some point or other: fancying people so much more gay or grave, or ingenious or stupid than they really are, and I can hardly tell why or in what the deception originated.

Sometimes one is guided by what they say of themselves, and very frequently by what other people say of them, without giving oneself time to deliberate and judge.”