Efficiency is doing things right; effectiveness is doing the right things.
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
数学不是关于数字、方程、计算或算法的：它是关于理解的。
Someone asked me what happiness is; I replied, not pursuing unnecessary things.
Science teaches us humility, for every discovery reveals the vastness of our ignorance.
I'm not a princess. I'm a queen.