数学不仅仅是关于数字、方程、计算或算法:它是关于理解的。
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
Freedom is what you do with what's been done to you.
I don't believe in regrets. Regrets are a waste of time. They're the past crippling you in the present.
If everything was perfect, you would never learn and you would never grow.