写作是一种乐观的行为。如果你觉得它不重要，你就不会费心去做。
The act of writing is an act of optimism. You would not take the trouble to do it if you felt it didn't matter.
The beauty of mathematics lies in its ability to reveal the underlying simplicity in what appears to be complex.
我从不买任何东西，除非我能给出一个充分的理由，说明为什么我认为它会涨。