You must not think that what is hard for you to master is humanly impossible; and if it is humanly possible, consider it to be within your reach.
The wise are not ashamed to seek knowledge, for they know the ocean of wisdom is boundless.
君子给人的印象有三种变化:远看庄重威严,接触则温和可亲,听讲话则严肃不苟。
我喜欢挑战自己,超越自己的极限。
The most important skill in mathematics is the ability to think clearly.