The 27-6 victory over the Buccaneers has helped the Panthers turn a poor record of 1-3 into an impressive 9-3, as they sit second in the NFC Southern Division.
"There's no roof. [Just] the sky. We're going up. We're going up," said Hardy after the game.
"Every person on this team, every person in this building, has the same mentality right now. I feel like it's contagious. They feel like they can't be beat.
"All the work we put in, the blood and sweat and tears ... trying to figure out how to win, was for this. We've had this talent for years. We just didn't have the 'want to'. Now it's there."
The Panthers now face an important clash against New Orleans Saints in Week 14 as they bid to challenge for top spot in the division.