最重要的是保持谦逊。
"The most important thing is to stay humble."
不要担心你在数学上遇到的困难；我敢保证我遇到的困难比你还大得多。
We can easily forgive a child who is afraid of the dark；the real tragedy of life is when men are afraid of the light.
无色的绿色念头愤怒地睡觉。