The world is a mirror, and it reflects our ugliness.
Courage is what it takes to stand up and speak; courage is also what it takes to sit down and listen.
"Books are the plane, and the train, and the road. They are the destination, and the journey. They are home."
数学中最重要的是理解概念，而不仅仅是记忆公式。
自由意味着责任，正因为如此，多数人都惧怕自由。