谁人背后无人说,哪个人前不说人?
生活中闲言碎语在所难免,不必过分在意,做好自己即可。  
在数学中,最简单的问题往往能引出最深刻的见解。
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.
I am following Nature without being able to grasp her...