在数学中，你并不理解事物。你只是习惯了它们。
In mathematics, you don't understand things. You just get used to them.
To change one's life: Start immediately. Do it flamboyantly. No exceptions.
Psychology must be based on facts, not hypotheses.
优化阻碍了发展。
数字技术不会扼杀造纸业，自满才会。
过去在我心中跳动，就像第二颗心。
The Internet is the first thing that humanity has built that humanity doesn't understand, the largest experiment in anarchy that we have ever had.