Never give up, persistence is key, and determination can beat anything.
One of my favorite quotes:
"My greatest point is my persistence. I never give up in a match. However down I am, I fight until the last ball. My list of matches shows that I have turned a great many so-called irretrievable defeats into victories."
Bjorn Borg
Which is pretty much saying, no matter how bad you get beat up, keep going and going, and before you know it, those times you got beat up turn into triumphs.