I think the following quote can apply to just about anything you are trying to do. Whether you are training MMA, self defense, or attaining a goal you have set out to do for yourself. We have all gotten bloody lips and black eye but the most 
important thing is to get back in there an not letting that causing us to give up.
MMA Quote ,“You’ve got to be close enough to get hit and hurt in order to hit and hurt–that means an occasional split lip, bloody nose and black eye, as well as the infrequent knockdown or knockout during intense training.” –Kelly McCann