It takes so long that by the time the spaceship comes back, 100 years will have gone by.

去了很久，以至于宇宙飞船回来的时候，100年都已经过去了。

耶鲁公开课 - 死亡课程节选

I've gone through a series of such arguments, and the one that we ended with last time was the suggestion that we need to believe in the existence of a soul in order to explain the fact that we've got free will.

我已经讲过一系列这样的论证,上次课结束时我提到的一个论证认为,我们只有相信灵魂存在,才能解释我们拥有自由意志这一事实

耶鲁公开课 - 死亡课程节选