Okay, maybe the word Christian and fight should not go together since love is one of the main messages of Christianity. What I mean with fight here is not the punch-someone-in-the-face, get-into-trouble kind of fight, but the fight against fear, self-doubt, worry, anxiety and hopelessness when we face adversity in life.
When life knocks you down, you might be down for a while, but get back up and join the fight again. It is true what they say about what does not kill you makes you stronger. Once everything has settled down and you have passed the trial, you will see that it has made you a better person somehow.