The definition of a good mathematical problem is the mathematics it generates rather than the problem itself.
世界上充满了神奇的事物,耐心地等待着我们的感官变得更加敏锐。
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.
History does not repeat itself, but it recurs in different forms.
What's the point of having a voice if you're gonna be silent in those moments you shouldn't be?