他的幽默，即使带着来之不易的独特的捉摸不定感，暗示了肯尼迪(他曾经是一位单人喜剧表演者)必定有着坚韧不拔的毅力。

Humor, albeit of a particularly hard-won variety, suggests Kennedy (a sometime stand-up comic), is necessary for fortitude.

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但讲述这些故事同样需要勇气与坚韧的毅力。

But telling it also requires courage and tenacity.

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聪明人之所以不会成功，是由于他们缺乏坚韧的毅力。

The reason why smart people do not succeed is because they lack the tenacity of perseverance.

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