1 Corinthians 9:25-27

25People who run in races prepare their bodies well. They make themselves work very hard. They do this so that they will win a prize that will quickly become spoiled. But we work hard to receive a prize that will never become spoiled.

26Because of that, I do not run with no purpose. I do not fight like someone who only hits the air.

27I make my body do what I want it to do. I make it like my slave. I have told God's message to other people. I do not want to lose the prize myself. So I try very much to obey the rules of the race.