Complex, and confusing when people have varying understanding of the terms thrown around.

Mental toughness seems to me to be a mindset you develop - resolve, tenacity, determination, rationality in the face of pain, or fear of the unknown. Or maybe a response to potentially traumatic experiences that only builds your stubborn, no nonsense stance rather than resulting in a wilting retreat into negativity, panic or despair.

In any case, telling stories about myself has resulted in accusations of grandstanding, so I find it less than desirable to do so in any forum. People who know me know that I'm nothing unusual in my peer group. My clients are the toughest people I have ever met and they do not hike.