“If I can’t dance, I don’t want to be a part of your revolution.” (attributed to Emma Goldman) I take it to mean that I am more than ready to work to change things for the better, but not to become an automaton in your politically correct/religious/patriotic/insert-other-agenda-here army. I won’t lose myself and I won’t stop being silly when I want to.
I also like:
“So what? Are you standing on a trap door?” (attributed to nicolasc) Meaning, so you made a mistake, or you said something stupid – is that it, game over? Is it the end of the world?
“When you’re 80 and looking back, what will you regret?” (also attributed to nicolasc…dang, I’m wise!) Meaning, you have one life, what is it that you’re doing or not doing that you will regret when your life passes before your eyes? I am not always great at this one (for example…here I am on the computer…!), but I try to remind myself of that.