It doesn’t mean he doesn’t really want to be a doctor
You’re right. Instead it means that he doesn’t have the willpower required to become a doctor. Presumably, this is something he didn’t know before he started school.
Right. Maybe not even that; maybe he just didn’t have the willpower required to become a doctor on that exact day, and if he re-takes the class next semester maybe that will be different.
So, to get back to the original point, I think the original poster was worried about not having the willpower to give to charity and, if he doesn’t have that, worried he also might not have the higher levels of willpower you would presumably need to do something truly brave if it was needed (like, in his example, resisting someone like the Nazis in 1930′s Germany.) And he was able to use that fear in order to increase his willpower and give more to charity.
You’re right. Instead it means that he doesn’t have the willpower required to become a doctor. Presumably, this is something he didn’t know before he started school.
Right. Maybe not even that; maybe he just didn’t have the willpower required to become a doctor on that exact day, and if he re-takes the class next semester maybe that will be different.
So, to get back to the original point, I think the original poster was worried about not having the willpower to give to charity and, if he doesn’t have that, worried he also might not have the higher levels of willpower you would presumably need to do something truly brave if it was needed (like, in his example, resisting someone like the Nazis in 1930′s Germany.) And he was able to use that fear in order to increase his willpower and give more to charity.