过去解释现在——这是进化心理学的基本前提。

没有事情的时候，需要照管这颗心，小心谨慎，好像有事一样；有了事情的时候，却要放下这颗心，泰然自得，好像没事一样。没有事情能像有事一样提防，才可以平息意想不到的变故；有了事情能像无事一样镇定，才能消除事件过程中的危机。

True innovation comes from a deep understanding of user needs.

I went to the woods because I wanted to live deliberately,I wanted to live deep and suck out all the marrow of life, To put to rout all that was not life, and not when I had come to die, Discover that I had not lived.

过去是一个谜，我们都在试图拼凑它。