Law is not a system of rules, but a union of primary and secondary rules.
Stories you read when you're the right age never quite leave you. You may forget who wrote them or what the story was called. Sometimes you'll forget precisely what happened, but if a story touches you it will stay with you, haunting the places in your mind that you rarely ever visit.
道的法则本是无为而自然,似有似无,玄妙难测。
Mathematics is not a spectator sport—you have to engage with it to appreciate its beauty.
Every problem in mathematics is an opportunity to learn something new.