“I said, “I don’t think I can give you that kind of emotion.” And he [Hitchcock] sat there and said, “Ingrid, fake it!” Well, that was the best advice I’ve had in my whole life, because in all the years to come there were many directors who gave me what I thought were quite impossible instructions and many difficult things to do, and just when I was on the verge of starting to argue with them, I heard his voice coming to me through the air saying, “Ingrid, fake it!” It saved a lot of unpleasant situations and waste of time.” 
― Ingrid Bergman