计算机科学中的真正挑战不是编写程序，而是理解计算的本质。
The real challenge in computer science is not to write programs, but to understand the nature of computation.
乐观主义者认为这是所有可能世界中最好的一个。悲观主义者知道确实如此。
"To live is the rarest thing in the world. Most people exist, that is all."
The best way to measure your investing success is not by whether you're beating the market but by whether you've put in place a financial plan and a behavioral discipline that are likely to get you where you want to go.