Being in the Center of Our Central Center

The Center. Our Center. The Center of You. Attack the Center. Protect your Center. Use your Center. What the hell does any of that even MEAN?!?!
Glad you asked, even if you didn't. Let's figure out what these meanings mean so we can use our Center to hit their Center.

Video of Naka Sensei talking to Pro Boxer from Japan. Go to the 12 minute mark - https://www.youtube.com/watch?v=haP6z4zTqQgI