数学思想的真正考验是它能否激发更多的问题。
The true test of a mathematical idea is its ability to inspire further questions.
The supreme quality for leadership is unquestionably integrity. Without it， no real success is possible， no matter whether it is on a section gang， a football field， in an army， or in an office.
每本书都是作者和读者之间的对话。