Charlotte Brontë said this quote

Do you wonder that I avow this to you? Know, that in the course of your future life you will often find yourself elected the involuntary confidant of your acquaintances' secrets: people will instinctively find out, as I have done, that it is not your forte to tell of yourself, but to listen while others talk of themselves; they will feel, too, that you listen with no malevolent scorn of their indiscretion, but with a kind of innate sympathy; not the less comforting and encouraging because it is very unobtrusive in its manifestations.How do you know? -- how can you guess all this, sir?I know it well; therefore I proceed almost as freely as if I were writing my thoughts in a diary.