" Here is something I understand about psychology, and I think it relates to fiction: if you loosen up your understanding of yourself in some way, then who knows how it will affect who you are in the world. In the same way, you can explore an avenue of your character - something about your character's past, or something in your character's present - and you don't know how the reader is going to connect it to what's going on in the story. That gives the reader a wonderful job to do, which is to try to make the links. I don't think you need to plan that in advance, or ever. I think it can happen if you follow what you think is interesting about the character.
In order to do this, you must trust what you don't understand. Our minds are so adept at trying to explain things that you have to shut that instinct down. As a starting point, choose an action that you can't explain. Often, writing about something that you don't fully get - what it's about or what's in it - is actually very useful because it takes you away from talking about theme or talking about abstractions. If you don't know what something is about, you are probably going to be very concrete in your exploration of it. You're going to say, 'I don't know what's in this world, so I'm going to be very direct in the way I present it.' This gives the reader tons of space to form his or her own interpretations. "

― Dorothy Allison , The Writer's Notebook: Craft Essays from Tin House