You cannot get through a single day without having an impact on the world around you. What you do makes a difference, and you have to decide what kind of difference you want to make.

The only thing that matters is how you feel about yourself.

If you're not crazy, you're not a true genius.

自私基因理论并不是关于日常意义上的自私的理论。它是关于行为进化的理论。