We have to show these men and women freedom by enslaving them, and show them courage by frightening them
You have to know the answer to this question. If you died right now, how would you feel about your life? Hitting bottom is not a weekend-retreat, it's not a g*dd*mn seminar. Stop trying controlling everything and just let go.
first you have to give up. First, you have to know, with no fear, know that someday you are going to die. Until you know that, you are useless.
There you go, thats the best I can do for now. Theres other stuff, but its really more like conversations, not anything that lends itself to copy and paste style quotes. At the end the characters also start something called Project Mayhem to just generally cause alot of well...Mayhem.
Like I said, just my take but some of what I read of that letter sounds alot like the phrases used in the book and movie.