If you find that a point cannot be made without narration, it is virtually certain that the point is unimportant to the story (which is to say, to the audience).
David MametMy tendency as an actor was to correct people, was to say, 'What if we tried it this way, what about if we tried that way?' That's terrible habit for an actor, but that's a good habit for director. So I became a director.
David MametThe great movie can be as free of being a record of the progress of the protagonist as is a dream.
David Mamet