The true challenge in mathematics is not solving problems, but asking the right questions.
好人不需要法律告知他们负起责任，恶人总是绕法律边缘而行。
Every person you meet knows an amazing lot about something you know virtually nothing about. Your job is to discover what it is， and it won’t be obvious.
In mathematics, truth is found not through consensus but through proof.
Die Wahrheit ist oft unwahrscheinlicher als die Fiktion.