"These presidents are human beings with their own need to withstand adversity, sometimes to conquer fear, " Goodwin said.

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Without knowing the history of the Cenotes in Mexico, I was determined to dive in a cave and conquer my fear of what I could not see.

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If that suggests a tremulous fear of life outside, his attempts to confront and conquer it, however localized, smack of a dorky daydream.

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