Every life is in many days, day after day. We walk through ourselves, meeting robbers, ghosts, giants, old men, young men, wives, widows, brothers-in-love, but always meeting ourselves.
"Stay hungry, stay foolish."
The last of human freedoms is the ability to choose one's attitude in any given set of circumstances.
Mathematics is not just a collection of abstract concepts, but a language that allows us to understand the universe.
哥本哈根解释不仅仅是一种理论，而是一种思考量子世界的方式。