The price we pay for the anticipation of our future is anxiety about it. Foretelling disaster is probably not much fun; Pollyanna was much happier than Cassandra. But the Cassandric components of our nature are necessary for survival.

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Quote text and notes from Wikiquote: Carl Sagan (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.