Because when a person is alone, that person will be proud to think that he is right.
own life is perfect.
Self-indulgence, self-satisfaction with the status quo.
In the movie, the most touching thing is the change of Rain Man.
During the days when Raymond lived with his younger brother, Raymond's ideas had made great progress.
As a child, Raymond was sent away because of his younger brother.
Now his younger brother is working hard to help Raymond out of the shadows.
It's also a relief for Charlie.
The ending of the movie is kind of sad.
Charlie finally loses the chance to help Raymond.
This may be the result of Charlie's sins for so many years.
Still, Charlie has saved himself on days like this.
It can be considered a good result.
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