Physical prowess is so easy to conceptualize, it's visible. Someone can be; fast, strong, coordinated etc.. Psychological resilience on the other hand is harder to see and for this reason it is often under appreciated. Getting your 'head' right is the first step to rehab/performance success. So, when I see a patient or runner who has a 'highly tuned' mental game, I get excited about working with them.  Reality is, shit happens! Throwing a tantrum isn’t going to change anything. So, if you understand how you think, you will better be able to manage how you feel, behave and act. Reality is not the problem. No matter how true it feels, this is an incorrect assumption. There is nothing good or bad but thinking makes it so.  You are the one that has to adapt. What you can change is what you are thinking of the situation, your perception. You have power over how you evaluate reality and how you respond.