Bill Belichick is one of the winning-est coaches in NFL history. He has one sign in the Patriots locker room that comes from the Art of war. It states, "Every battle is won before it is fought." The team that is the most prepared has won the game before the first whistle blows.
In 2 Timothy 4:7-8, Paul says "I have fought the good fight, I have finished the race, I have kept the faith. Now there is in store for me a crown of righteousness, which the Lord, the righteousness judge, will award to me on that day - and not only to me, but also to all those who have longed for his appearing."
Christ won the battle over sin on the cross. For those who keep the faith, the battle has already been won before it is fought.