1 Corinthians 9:23-26

And I do all this for the sake of the gospel, so that I may share in its blessings along with you. Do you not know that in a race all the runners run [their very best to win], but only one receives the prize? Run [your race] in such a way that you may seize the prize and make it yours! Now every athlete who [goes into training and] competes in the games is disciplined and exercises self-control in all things. They do it to win a crown that withers, but we [do it to receive] an imperishable [crown that cannot wither]. Therefore I do not run without a definite goal; I do not flail around like one beating the air [just shadow boxing].