抽象的目的不是模糊，而是创建一个新的语义层次，在这个层次上可以绝对精确。
The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.
Never stop learning—the moment you do, you start falling behind.
I've learned that people will forget what you said, people will forget what you did, but people will never forget how you made them feel.
"Die Vergangenheit ist nie tot, sie ist nicht einmal vergangen."
