Kanbu Bust-Out: "My sister speaks highly of you, though I am yet to be convinced that a gaijin can offer anything but disappointment. Perhaps you could help me deal with a situation that has me at a disadvantage. Of course, failure has its own disgrace."
Grand Theft Auto: "It is impossible to overestimate the importance of etiquette in this line of work"
Deal Steal: "When trouble looms, the fool turns his back, while the wise man faces it down."
Shima: "To be truly strong, it is important that you never show weakness."
Smack Down: "YOU! How fitting would it be to show your worthless face!"
So, that's it! Not all of them are exactly quotes, but I guess they can make up for it.