sheep, wolves and sheepdogs

http://www.townhall.com/columnists/column.aspx?UrlTitle=three_kinds_of_people&ns=MikeSAdams&dt=06/11/2007&page=1

There are those who watch what happens, and do nothing. There are those who wonder what happened. There are those who don't care what happened. And there are those who know what happened, who know that it will happen again and who are ready, willing and able to do something about it.