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The real contest is always between what you've done and what you're capable of doing. You measure yourself against yourself and nobody else.

The human condition is one of constant struggle, but it is also one of endless possibility.

To understand the present, we must dig into the past.

每一項科學發現都應該以其對人類福祉的貢獻來衡量。

故事是作者寫給自己的一封信，但允許他人閱讀。