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I don't think I want to know a six year old who isn't a dreamer, or a sillyheart. And I sure don't want to know one who takes their student career seriously.
— Buck Russell · Uncle Buck

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker says a child who isn't a dreamer or a bit of a goofball isn't someone they'd want to meet, and a six-year-old who treats school like a career is even worse. It's a playful defence of imagination and silliness over early seriousness.
Context reviewed