Dialogue is how the audiences hear the mind, nature and feelings of the characters expressed. For that the writer should know about the characters exhaustively. Dialogue also has to reflect immediate considerations and needs inside the story, address future considerations and perhaps recount events in the past, too. All these mean, the writer has to have a thorough grip of the world of story and that of the characters before he/she gets the confidence to choose what the characters have to speak.
Dialogue is how the audiences hear the mind, nature and feelings of the characters expressed. For that the writer should know about the characters exhaustively. Dialogue also has to reflect immediate considerations and needs inside the story, address future considerations and perhaps recount events in the past, too. All these mean, the writer has to have a thorough grip of the world of story and that of the characters before he/she gets the confidence to choose what the characters have to speak.