None will ever be a true Parisian who has not learned to wear a mask of gaiety over his sorrows and one of sadness, boredom or indifference over his inward joy. You know that one of your friends is in trouble; do not try to console him: he will tell you that he is already comforted; but, should he have met with good fortune, be careful how you congratulate him: he thinks it so natural that he is surprised that you should speak of it. In Paris, our lives are one masked ball