Dialogue has to show not only something about the speaker that is its own revelation, but also maybe something about the speaker that he doesn't know but the other character does know.
Eudora WeltyLearning stamps you with its moments. Childhood's learning is made up of moments. It isn't steady. It's a pulse.
Eudora WeltyI had to grow up and learn to listen for the unspoken as well as the spoken-and to know a truth.
Eudora Welty