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.
Concentration and mental toughness are the margins of victory.
Mental toughness is to physical as four is to one.
In terms of instilling the values of mental toughness and work ethic, discipline is the gift that keeps on giving.
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.