there are two kinds of pretending. There is a bad kind, where the pretence is there instead of the real thing; as when a man pretends he is going to help you instead of really helping you. But there is also a good kind, where the pretence leads up to the real thing. When you are not feeling particularly friendly but know you ought to be, the best thing you can do, very often, is to put on a friendly manner and behave as if you were a nicer person than you actually are. And in a few minutes, as we have all noticed, you will be really feeling friendlier than you were. —from Mere Christianity