I consider myself an optimistic person. I think that this has served me well over the years. When I have been approached with a bump in the road over the years - I try to not allow it to control me. It is all about attitude and especially not run away from the issue. When faced with a challenge along the way - do not allow it to define you but allow it to be a learning experience to expand your horizons!
Struggling is not pleasant at all but if it is approached with a good "can do" attitude and an open mind about turning the struggle into an opportunity - then you are a success!