"I write songs about my life, and my life is pretty normal."

关心是某事物确实重要的状态。

行为由当前刺激情境和过去的强化历史决定。

We're told, from many sources, that any onecan achieve anything. We've done away with the caste system, we are now in a system where anyone can rise to any position they please. And it's a beautiful idea. Along with that is a kind of spirit of equality; we're all basically equal. There are no strictly defined hierarchies. There is one really big problem with this, and that problem is envy.