Resistance forces- difficulties and challenges- are what make you strong. My injuring my foot is actually showing me how much stronger I've gotten from judo. When I last hurt myself this severely, two years ago (not long after I started judo), I couldn't use the crutches we had. You see, I was too weak.
Now, I'm getting around on them as quickly as I can move on legs, and I'm not tiring out yet.
It's amazing- a semiserious injury is creating confidence?