don't mess it up

I am not under an order to make the world a better place. Something like that. That's what Ethan Hawke's character in Reality Bites said.

Well, ok, some people think they don't owe the world anything, and that may be true, but please please please don't mess it up!

I am angry at people who claim to want the best for everyone, when all they want is to benefit from every single good thing they do unto others.

Well, thanks but no thanks. You suck!