“Courage is not something that you already have that makes you brave when the tough time start. Courage is what you earn when you’ve been through the tough times and you discover they aren’t so tough after all.”
I’m not sure whether I agree 100%… But this does begin explain Tough Mudder.
To me courage is what you have in the moment you do the right thing in spite of fear. Determination is the decision to keep going in spite of difficulty. Both are very hard to measure or feel in the moment you need them. Both are difficult to develop without trials.
What do you think?