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。
"The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."
In times of change, the learners inherit the earth while the learned find themselves beautifully equipped to deal with a world that no longer exists.
生活中最大的荣耀不在于从不跌倒，而在于每次跌倒后都能爬起来。
用心体会整理才能理解精确得当，所以应当沉着稳重，不然就成了口头耳边的小事，过后就忘了。事理要以典故为依据，因此必须学识广博，否则就成了随意推测，胡编乱造。