"You have to put in the hours because there’s always something which you can improve."
你必须投入时间，因为总有你可以改进的地方。
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
数学不是关于数字、方程、计算或算法：它是关于理解的。
We may have grown older, but the music keeps us young at heart.
"The truth is rarely pure and never simple."