Success is not the key to happiness. Happiness is the key to success.

Every cut should have a purpose, a reason to be there.

【译文】所谓仁人，只要能做到自己想成功时先帮别人成功，自己想得到时先帮别人得到，就可以了。推己及人，可算实行仁的方法。

The challenge of modern cryptography is not just to secure communication, but to do so in a way that is both efficient and scalable.

路上挤满了去某个地方的人群，但没有人知道他们要去哪里。