Let's say you are playing a role with only one simple line: "Good evening!" A lot of actors would walk in and say the line with a particular emotion. A strong actor would walk in knowing the relationship with the other person, knowing their character and knowing ‘suggested circumstances.' You may enter, wink and with a soft, ‘bed-voice' you say ‘Good evening!’ Or you may enter; knock your acting partner off the floor, and then triumphantly say your line. Or you may enter with a cold-blooded face, emotionlessly wink to the other actor and say ‘Good evening!' with the driest voice possible. The possibilities are endless as long as you dare to do what most actors forget or don't dare to do.