The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.
No book can bring you luck, but every book can help you become yourself.
科学与技术的进步并不意味着大多数人生活中智识复杂度的增加。通常恰好相反。
The rocks we extract today must leave a legacy we can be proud of tomorrow.