Have you ever come across dialogue that is meant to be inspiring, but just
isn't?
Whether it was in a novel, film, play, TV show, short story, or whatever, you found yourself cringing. The line (or monologue - which is even worse) was supposed to be wise and motivational, a deep insight into life, but the way it came out made you think, Puh-lease, this is so lame. No one would ever say that in real life - it's so cliché!
I'll give you an example from Eragon by Christopher Paolini (and this is one of the few criticisms I'll make of it because it's one of my favourite books). This monologue comes from Eragon's wise-guy uncle:
"First, let no one rule your mind or body. Take special care that your thoughts remain unfettered. One may be a free man and yet be bound tighter than a slave. Give men your ear, but not your heart. Show respect for those in power, but don't follow them blindly. Judge with logic and reason, but comment not. ..."
And that's only half of it.
Of course, these are all great messages that Paolini expresses, profound and true. But do they connect with us? Not really, no, because this kind of self-aware insight is rarely found in real life. No-one I know would ever speak like that, and if they did, I'd have to stifle hysterical laughter.
So how does a writer express his or her ideas, viewpoints and life lessons without stating them blatantly? Through story. Through events and turning points and character responses. Every time we write, we are showing the reader what
we think life is like. "This is my perception. This is my vision of the world, and the nature of the people who inhabit it. This is what these people would do under these circumstances for these reasons."
Story is a metaphor for life. It's a vessel through which readers become emotionally attached to an idea. You could tell someone of the repulsiveness of teen violence, or they could read the Hunger Games. Which do you think would leave them more convicted? You could have a character say, "There's always hope," or you could show it by having your protagonist achieve his or her goal despite the immense odds stacked against them. Again, which would connect to the reader more?
When it comes down to it, it's a question of showing or telling.
And of course, there is a place for telling. There is a place inspiring dialogue -
JRR Tolkien was especially good at using it. But if you use it too much, or in the wrong way, it ends up having the opposite effect.
So, as a rule of thumb, let telling dialogue compliment your showing. Express yourself first and foremost through events and character - and if you need dialogue to finish the job, go for it.