The idea or theory that you are currently formulating, that seems so fresh and alive and truthful, will almost certainly be shot down or ridiculed in a few decades or centuries. And so it is best to keep this in mind and not grow too fond of your ideas or too certain of their truth.

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Greene also writes here: (We tend to laugh at people prior to the twentieth century who did not yet believe in evolution and who saw the world as only 6,000 years old, but imagine how people will be laughing at us for the naïve beliefs we hold in the twenty-first century!)

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