Sometimes the hardest thing and the right thing are the same.
The beauty of mathematics lies in its ability to describe the universe in the simplest terms.
这就是意义所在。你需要它,就好像自己不要忘记。忘记世上还有不是用石头围起来的地方。忘记自己的内心还有你自己的东西,他们碰不到的东西。