‘Unfortunately, that unbroken flow is all too rare. Most actors, if indeed they are aware of it at all, use it only when they are saying their own lines. But let the other actor begin to say his and the first one neither listens nor makes an attempt to absorb what the second is saying. He ceases to act until he hears his next cue. That habit breaks up constant exchange because that is dependent on the give and take of feelings both during the speaking of the lines, and also during the reply to those already spoken, and even during silences, when the eyes carry on.
Important paragraph on listening, absorbing while othe actor is talking.
