改变始于承认过去，但着眼于未来。
Change starts with acknowledging the past but focusing on the future.
最大的勇气是不顾一切地去爱。
不要把事实告诉不值得的人。
Don't wait until everything is just right. It will never be perfect. There will always be challenges, obstacles and less than perfect conditions. So what. Get started now. With each step you take, you will grow stronger and stronger, more and more skilled, more and more self-confident and more and more successful.
数学教会我们逻辑思考并系统地处理问题。
计算复杂性理论的发展向我们展示了并非所有问题都是平等的。