5. "You can't win, Darth. If you strike me down, I shall become more powerful than you could possibly imagine." - Star Wars
Christ, do I really need to go into detail on this one? It's from Star Wars, and if you haven't seen it or don't know what I'm talking about, there's 0% chance you've made it this far into the list. Honestly, I almost left this pick off here because it seemed so obvious and trite (see also my #1 choice), but ultimately, I couldn't leave it off and risk leaving my house tomorrow morning to violent protests from a bunch of pimple-faced teenagers who've never made physical contact with a female. Seriously, being beaten with plastic light sabers hurts. This is the kind of slogan that movie slogan T-Shirts were invented for, though it is a little long. One for the more portly gentleman's chest perhaps.