There are numerous jokes in the theatre world about motivation. There’s a rather famous one in “Noises off” when the director tells a character to take the groceries into the living room. “So, What’s my motivation?” the character asks. The audience knows that the motivation is that someone else just went into the kitchen and the whole point of a farce is to make sure that characters miss each other. That doesn’t help the actor much who is trying for all he’s worth to play the character honestly with real motivation.