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The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all. And that, of course, causes great confusion.

我從不猜測。這是一個令人震驚的習慣——對邏輯能力具有破壞性。

Dreams need courage, and even more action.

The best experiments often come from simple ideas and careful observation.

發(fā)現(xiàn)可能性的極限的唯一方法就是超越它們進入不可能。

如果你愿意，我們可以回到那個山洞。

“你得丟開以往的事，才能不斷繼續(xù)前進！”我想那就是我這次跑步的意義了。