对黑洞的研究将我们带到了理解的边缘，在那里已知的物理定律失效，新的理论必须出现。
降低成本的最好方法是一开始就没有成本。
解释：乌鸦聚集在一起，虽然看上去很和好，实际上并不亲密；不慎重地结交朋友，虽似牢固，终必破裂。
物理学的美在于它能够用简单的定律解释复杂的事物。
"Theologians talk about a prevenient grace that precedes grace itself and allows us to accept it. I think there must also be a prevenient courage that allows us to be brave - that is, to acknowledge that there is more beauty than our eyes can bear, that precious things have been put into our hands and to do nothing to honor them is to do great harm."