仓库里空虚了日子就会难，子孙愚笨了怎么知晓礼义呢？
You have to write the book that wants to be written. And if the book will be too difficult for grown-ups, then you write it for children.
Innovation is not about saying yes to everything. It's about saying no to all but the most crucial features.
In business, if you're not failing occasionally, you're not trying hard enough.
