Successful entrepreneurs must possess both idealism and realism.
时间不是一条线，而是一个维度，就像空间的维度一样。
如果你一直重读上一章，就无法开始人生的新篇章。
It's often safer to be in chains than to be free.
The most profound discoveries in mathematics often come from questioning the most basic assumptions.
数学中最深刻的发现往往来自于对最基本假设的质疑。