When you have manhandled a fierce division rival 37-3 to move into a tie for first place, you have every right to smile. Yet the Packers wisely tried to contain their glee after Sunday’s mauling of the Bears at Lambeau Field. The locker room was a satisfied one, but also cautious for a couple reasons. First of all, by its very nature a 5-5 team needs to show excellence more consistently. Also, the Packers didn’t want to strut too much knowing a rematch at Soldier Field on December 22nd figures to loom large in determining the NFC North division champion. For one afternoon at least, the Packers looked like a contender and the Bears looked like…well, I’ll leave that to your vivid imagination. The Packers ground game put it all together against one of the NFL’s stoutest outfits against the run. The maligned pass protection kept Aaron Rodgers clean and allowed him to bounce back with a strong game.The Packers revamped linebacker corps was in the middle (literally) of a dominant performance against a Bears offense limited by a gimpy quarterback and a poor group of wide receivers.The Packers special teams kept Devin Hester quiet, with Colin Cole even extending a warm Green Bay welcome to the return man on the sidelines. If the NFL has shown us anything this season, it is that you shouldn’t get too excited about one game. The manic, up-and-down fluctuations of team performances have left fans’ heads spinning all over the league. Remember Cleveland blowing out the Giants or the Jets destroying Arizona? Yes, the Packers may have provided a glimpse into a strong stretch run to the division title. They’re also capable of getting lit up by Drew Brees and the Saints next Monday night in New Orleans. Neither scenario should surprise us. Not this year.