Pros are just amateurs who know how to gracefully recover from their mistakes.
专业人士其实就是能更优雅的从错误从回到正常状态的业余人士。
数学不仅仅是关于数字、方程、计算或算法：它是关于理解的。
Quality is not a myth; it is a fact.
"The past is a candle at great distance: too close to let you quit, too far to comfort you."
学习应使人感到快乐，否则不能称之为真正的学习。
"I hope that in this year to come, you make mistakes. Because if you are making mistakes, then you are making new things, trying new things, learning, living, pushing yourself, changing yourself, changing your world. You're doing things you've never done before, and more importantly, you're doing something."