World Literature
The "Inextinguishable Race" works and owns its economy but fears "Grown-ups" and "imposters" who do not have its interests or work ethic at heart; the grown-up pretenders will never be as small (an inverse metaphor which equates large size with exploitation and small size with intimacy).
The "Third Bank of the River" is neither here nor there, a social space between one's home and the unknown, and a psychological place between responsibility and disinterest, a name for a kind of "social alienation" that can afflict anyone in any relationship.
Brigida romanticizes Mozart, who leads her by the hand over a crystal stream -- for a while.