1 Corinthians 9:24-27

You know that many runners enter a race, and only one of them wins the prize. So run to win! Athletes work hard to win a crown that cannot last, but we do it for a crown that will last for ever. I don't run without a goal. And I don't box by beating my fists in the air. I keep my body under control and make it my slave, so I won't lose out after telling the good news to others.