Every quarterback can throw a ball; every running back can run; every receiver is fast; but that mental toughness that you talk about translates into competitiveness. Tom Brady
Concentration and mental toughness are the margins of victory. Bill Russell
Mental toughness is to physical as four is to one. Bobby Knight
In terms of instilling the values of mental toughness and work ethic, discipline is the gift that keeps on giving. William Baldwin
People think SEALs are cold-blooded, heartless, wound-up, brainwashed killers. They imagine you can just point a SEAL in a direction and say, 'Go kill.' The truth is you're talking about a bunch of kind-hearted, jovial guys. The only thing that separates them is mental toughness. Howard E. Wasdin