When you hold a piece of aggregate, you're holding millions of years of earth's history.

The process of solving a mathematical problem is often more important than the solution itself.

我认为人们相信天堂是因为他们不喜欢死亡的想法，因为他们想继续活着，他们不喜欢别人会搬进他们的房子并把他们的东西扔进垃圾堆的想法。