Don’t count the days, make the days count.
The more you try to be happy, the more unhappy you become.
The function of freedom is to free someone else.
我不让成功冲昏头脑,我让它触动心灵。
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。