You have to really believe not only in yourself but in what you're doing.
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。
黄金法则就是没有黄金法则。
新生儿具有奇妙的自我调节能力。
The only person you should try to be better than is the person you were yesterday.