Talk Talk

What your character thinks is shown in everything she says. She may be proving or disproving some particular point or enunciating some universal proposition.  All these comments reveal her personality. This also reveals her moral purpose. There are things she wants to talk about or things she wishes to avoid.

Don’t confuse the reader by having your character talk about something of absolutely no relevance to the story. Everything said must be relevant, revealing character’s motivation, experience and attitude.