进化心理学不是关于人性中不可改变的部分，而是关于在我们祖先环境中具有适应性的部分。

There are two ways to extend a business. Take inventory of what you are good at and extend out from your skills. Or determine what your customers need and work backwards, even if it requires learning new skills.

樵夫的斧头向树要柄，树便给了它。

咱们来较量一下吧！你和我！

I try to write books that are both entertaining and thought-provoking.