Do you not see that in a running competition all take part, but only one gets the reward? So let your minds be fixed on the reward. And every man who takes part in the sports has self-control in all things. Now they do it to get a crown which is of this world, but we for an eternal crown. So then I am running, not uncertainly; so I am fighting, not as one who gives blows in the air: But I give blows to my body, and keep it under control, for fear that, after having given the good news to others, I myself might not have God's approval.

1 Corinthians 9: 24-27, BBE