The truth of ourselves is the root of our acting.
Acting in a scene is like paddling a canoe from a pebbly beach on to the river, the writer builds the canoe, and the actor provides the river. The river is the actor's thoughts and emotions.
With a developed imagination there's no place you can't go.
WHY is the most important word in an actor's vocabulary.
That which hinders your task is your task.
Don't be an actor. Be a human being who works off what exists under imaginary circumstances.