I think that the most important thing is to be grateful for what you have.

学习数学的唯一方法就是做数学。

教育不是为生活做准备；教育本身就是生活。

最肥沃的生长土壤是相信使命的团队。

"The act of writing is an act of optimism. You would not take the trouble to do it if you felt it didn't matter."

在回报方面，时间是你的朋友。但在成本方面，时间是你的敌人。