So many, here's my top 10

10. "They only made one mistake, they signed this fight."
Ferdie "The Fight Doctor" Pacheco

9."Every strike brings me closer to the next home run."
Babe Ruth

8. "Honey I forgot to duck"
Jack Dempsey

7. "A champion is someone who gets up when he can't.
Jack Dempsey

6. "If you screw things up in tennis, it's 15-love. If you screw up in boxing, it's your ass."
Randall Cobb

5. "Repitition does not make a lie the truth"
Franklin Delanore Roosevelt

4."The fight is won or lost far away from witnesses - behind the lines, in the gym and out there on the road, long before I dance under those lights"
Muhammad Ali

3. Boxing is like jazz. The better it is, the less people appreciate it.
George Foreman

2."Never Fight ugly people—they have nothing to Lose"
Wayne Kelly

1. "Do unto others as you would have them do unto you"
Some dude named Jesus