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。

社会结构的连续性取决于文化从一代到下一代的传递。

The chief beauty about time is that you cannot waste it in advance. The next year, the next day, the next hour are lying ready for you, as perfect, as unspoiled, as if you had never wasted or misapplied a single moment in all your life. You can turn over a new leaf every hour if you choose.

世界是心灵的镜子。