ON ACTING: Tri-Part Structure
There is in every good scene a sense of inevitable growth and change, the dynamic progression from beginning to middle to end; A>B>C is an essential structural component in all scenes; it makes them ordered, dramatically compressed and audience-identifiably rhythmic...and hence exciting to the audience.
Good writing inevitably has structure. So when analyzing a scene (and preparing to perform it) the actor is charged to find the beginning, middle and end of it; the introduction, the engagement and the resolution...and the change to which that leads.
Good acting requires no less.