I like Royce's quote: You put the Devil on the other side and I will come to fight.
Or Helio: A knock out is an accidental win
Ken Shamrock: If I get a hold of something, I'm gonna break it
Vanderlei Silva: I promise violence
Bas Rutten: You won't be UFC champion, but you will know pain
Gandhi: Where there is only a choice between cowardice and violence, I would advise violence