If you are a Chicago Bears lineman, you more than likely love your quarterback. Jay Cutler is pretty well known for his under-the-rader, non-publicized generosity towards others, and there are stories out there about how well he takes care of his big guys up front.
Pro athletes are always going to do their jobs, but the best leaders can make their teams work even harder. Give a little more. Provide a little more motivation.
Of course, this year's offensive line has been just as complimentary towards Jay Cutler as anyone-- they see him as their leader, the guy who grinds it out with them week after week, and someone that provides them with motivation to bust their rears each week.