虽然无法改变过去，但可以改变未来。
学习数学的最好方法就是做数学。
实现明天理想的唯一障碍是今天的疑虑。
I like to tell a story and not explain it. I like to leave it open-ended.
数学家是将咖啡转化为定理的装置。
In energy, the only constant is change—embrace it.