记忆是一台能够穿越时光回到过去的机器。
The fundamental job of a kid is to be selfish—to pursue their own needs and desires—and the fundamental job of a parent is to be selfless.
对富有的单身汉应该客以重税。让某些人比其他人更快乐是不公平的。
People, even more than things, have to be restored, renewed, revived, reclaimed, and redeemed; never throw out anyone.  
The joy of mathematics comes from the act of creation, not just the result.