Now,it's very tempting at this point to say,look,of course Nothing could be easier ? Just imagine being in heaven forever,right?

现在我很想说，当然了,这没什么难的,只要想象永远在天堂就行了对不对？

耶鲁公开课 - 死亡课程节选

The reason it looks like a tautology, because you look around, nothing seems to have its velocity forever.

其原因听起来像是绕圈子,因为你看看四周,似乎一切都不可能永远运动下去

耶鲁公开课 - 基础物理课程节选