The Mask (n.) is not hiding a truer warm person underneath, for that person is the lie, there so we will not see that the mask runs the show, which is why the hero in Brecht who drops the mask to help the peasants is denounced.
The Mask (n.) of the Good of the Fatherland was in a sense mere ideology — yet had it fallen, the Nazi machine could not have functioned in its naked state, as a pure killing apparatus.
A Mask (n.) can be more authentic than the face: the emotions I perform through a false persona may be truer than what I really feel in myself.
The Mask (n.) in its symbolic form matters more than the reality of the one wearing it — Groucho, caught in a lie, asks 'Whom do you believe, your eyes or my words?'
The Mask (n.) of the superhero is an asexual partial object that keeps him in a pre-Oedipal world with no death or guilt, only endless fun and fighting.