Every problem in mathematics is a puzzle waiting to be solved, and the joy is in the solving.
数学中的每个问题都是一个等待解决的谜题，而乐趣就在于解决的过程。
I prefer winter and fall, when you feel the bone structure of the landscape—the loneliness of it, the dead feeling of winter. Something waits beneath it, the whole story doesn’t show.
我们必须记住过去，才能更好地面对未来。