We often think of endurance in terms of the physical, how much we can do before we’re out of our depth, but things like psychological and emotional endurance contribute so much to our experiences. David McConnell’s 20-year military career was a test of his physical endurance, but it wasn’t until he retired that he learned about the other kinds.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.