None will ever be a true Parisien who has not learned to wear a mask of gaiety over his sorrows and one of sadness, boredom or indifference over his inward joy

None will ever be a true Parisien who has not learned to wear a mask of gaiety over his sorrows and one of sadness, boredom or indifference over his inward joy.

Gaston Leroux, The Phantom of the Opera