The sociological imagination enables us to grasp history and biography and the relations between the two within society.
解析：天地之所以能长久存在，是因为它们的一切运作都不为自己，所以能够长久。
I guess Lieutenant Dan figured there's some things you just can't change. He didn't want to be called crippled, just like I didn't want to be called stupid.
The best ideas often come from the intersection of different fields and perspectives.