变得快乐的技巧几乎完全不同于不悲伤的技巧。
"Writing is a way of talking without being interrupted."
在数学中,提出问题的艺术必须比解决问题更有价值。
Ninety-nine percent of the troubles that threaten our civilization come from too optimistic, therefore we should have a system where the accounting is a way more conservative.