At least 80 percent of the success of the football team is determined by the fight and spirit that they put into their play.
Other George Halas quotes:
Many people flounder about in life because they do not have a purpose, an objective toward which to work.
You can achieve only that which you will do.
Find out what the other team wants to do. Then take it away from them.
Nothing is work unless you'd rather be doing something else.
Nobody who ever gave his best regretted it.
Don't do anything in practice that you wouldn't do in the game.