One of the things that I’ve been thankful for is the blessing of good health. And by good health, I don’t mean a life free of disease or injury but I mean a life free from getting colds, flus, etc. I never get sick.
As I’m getting a bit older, I once in awhile will have a day where I get say a migraine or am sore from working out in the yard and my productivity drops to nil. That sort of thing would have a devastating impact on trying to succeed if it was common.