The first one, what Lisa said is the truth, so I think the director... has a profound meaning. On the surface, the heroine finds herself, but she actually wants to say that those who do not follow the rules of the social game set by people are lunatics , need to be treated.
Second, the hospital is just an infusion machine of the social system, and the philosophy of the doctors in it is that only what is in line with the society is right.
Third, no one was healed, some were just compromises and disguise.
The distance between a genius and a lunatic is probably not far. Sometimes you just acquired a talent and others tell you that you are lunatic. When you think you are embracing the right side, you are actually just choosing a life path. Continent to Rome.
All our lives we're half-mad for what we desire.
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