人们雕刻东西，如果半途而废，即使是腐烂的木头也不能刻断；如果坚持到底，即使是金属或者石头都能雕空。

事实上，自然科学长期以来只是大脑和想象力的产物：现在是时候回归到对物质和显而易见事物的朴素而健全的观察了。

I would like to fly in space.Absolutely.That would be cool.I used to just do personally risky things， but now I’ve got kids and responsibilities， so I can’t be my own test pilot.That wouldn’t be a good idea.But I definitely want to fly as soon as it’s a sensible thing to do.

有一种鸟儿是永远也关不住的，因为它们的每片羽毛都闪烁着自由的光辉。