Yeah. My uncle was shot down (helicopter pilot) twice and survived to return to combat. The irony is that he had been in seminary before joining the Marines. His drill sergeant was a diminutive man who would stand on his toes and scream up at him “You hear me Preacher Boy?!” 

 The humbling is mandatory. You gotta know you probably will never have odds stacked in your favor to survive. If you can’t eat sh*t you won’t make it.