One of the most powerful opportunities of the novel format is the ability to describe what a character is thinking. In movies or stage plays (with exceptions) you must show what the character is thinking through action and/or dialog. But in a novel, you can just come out and say it.
For example, in a movie, you might say:
John walks slowly to the window and looks out at the park bench where he last saw Sally. His eyes fill with tears, yet he manages a half-smile. He bows his head and slowly closes the blinds.
But in a novel you might write:
John walked slowly to the window, letting his gaze drift toward the park bench where he last saw Sally. Why did I let her go, he thought. I wanted so much to ask her to stay. Though saddened, he reflected on happier times with her – days of more contentment than he ever imagined he could feel. And slowly, his mood brightened ever so slightly.
The previous paragraph uses two forms of expressing a character’s thoughts. One, is the direct quote of the thought, as if it were dialog spoken internally to oneself. The other is a summary and paraphrase of what was going on in the character’s head.
Most novels are greatly enhanced by stepping away from a purely objective narrative perspective, and drawing the reader into the minds of the character’s themselves.
Learn more about developing characters