are masks ever good?

“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 that you were. Very often the only way to get a quality in reality is to start behaving as if you had it already.” - C.S. Lewis