Every aspect of learning or any other feature of intelligence can in principle be so precisely described that a machine can be made to simulate it.

Before you are old， attend as many funerals as you can bear， and listen. Nobody talks about the departed’s achievements. The only thing people will remember is what kind of person you were while you were achieving.

生命太短暂，不要浪费时间在无关紧要的事情上。

几个世纪以来纸张一直是人类知识的载体，我们的责任是确保它再延续几个世纪。#

"I write for kids because I was a kid who needed books."