自守形式的研究是进入数论核心的旅程。
There are only two tragedies in life: one is not getting what one wants and the other is getting it.
生活里有两个悲剧：一个是没有得到我们想要的；另外一个是得到了。
The key is to stay present and enjoy the moment.
学历史,学历史。历史里藏着一切的智慧。
忽视与无知不同，你必须努力去忽视。
For the best results with your children， spend only half the money you think you should， but double the time with them.