Authors:

I've found that good dialogue tells you not only what people are saying or how they're communicating but it tells you a great deal - by dialect and tone, content and circumstance - about the quality of the character.

"EO Wilson: Our Greatest Biologist Writes A Novel, ‘Anthill’". Interview with Steve Ross, www.huffingtonpost.com. June 5, 2010.
I've found that good dialogue tells you not only what people are saying or how they're communicating but it tells you a great deal - by dialect and tone, content and circumstance - about the quality of the character.