He also adds confidence, something which this team doesn't seem to have much of right now. Sure we're winning games, and are leaps and bounds better than the yanks, but it doesn't seem like we have the confidence necessary to be division leaders.
It may be a result of last year, but the drive to win seems to be severely reduced, both in the fans and the players. (I find myself forgiving mistakes MUCH more easily than I have in the past). Schilling is a born winner. He's an intense competitor as we've seen with the bloody sock, and he wants to win. With him back in the dugout starting games, it may give the sox the kick they need to run away with this thing.