I won't be able to think of them all, but here's a couple I like.
"What is life? Life is like a big obstacle, put in front of your optical to slow you down. And every time you think you've gotten past it, it's gonna come back around and tackle you to the damn ground. What are friends? Friends are people that you think are your friends, but they're really your enemies, with secret identities and disguises, to hide their true colours." - Eminem
"Everything turns out okay in the end. If things aren't okay, then it's not the end"
I'm actually having a big mind-block right now, I know so much more .. but post your favourites, could result in a lot of really good quotes.