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Anna: A chance to change my lonely world
Elsa: Conceal
These lyrics show the difference of the girl's upbringings and lifestyles. Anna is overwhelmed with excitement to meet new people, whereas Elsa wants it all to be over and done with. Also, the 'conceal' suggests that Elsa cannot fully ignore her powers, so instead hides them when she has to, and simply hides away and isolates herself from the world the rest of the time.