A terse saying embodying a general truth, or astute observation.
Screenwriting is a craft based on logic. It consists of the assiduous application of several very basic questions. What does the hero want? What hinders him from getting it? What happens if he does not get it?
On Directing Film
Once the weakness and need have been decided, you must give the hero desire. Desire is what your hero wants in the story, his particular goal.
The Anatomy of Story
What’s the difference between plot and story? Information and emotion.