I think grit is obtained through adversity.
Hard times create strong people, Strong people create good times, Good times create weak people, Weak people create hard times.
What time is it?
Hard times create strong people, Strong people create good times, Good times create weak people, Weak people create hard times.
What time is it?
Stress causes health issues. Particularly traumatic stress causes (wait for it) Post-Traumatic Stress Disorder. All else being equal, a person with ulcers and anxiety disorders and depression and PTSD is a less capable person than one without.