The historian’s task is to understand the past, the novelist’s to make it live.
People can be divided into these types: strangers, acquaintances, familiar people, friends, and close friends. True friendship isn't about compliments to your face, but whether you're mentioned when they talk about friends behind your back.
Thought is the most difficult task, which is why so few engage in it.
适应能力是当今快速变化的世界中最重要的技能。
"The challenge in theoretical computer science is not just to solve problems, but to understand why they are hard to solve."