1 Corinthians 9:24-27 - The Need For Self-Discipline
24 Know you not that all the runners in the race-course run the race, but that one receives the prize? So run, that you may obtain the prize. 25 Every combatant in the public games is temperate in all things: they, indeed, that they may obtain a corruptible, but we, that we may obtain an incorruptible crown. 26 I, therefore, so run, not as with uncertainty; I so aim my blows, not as one that beats the air; 27 but I put my body under severe discipline, and bring it into subjection, lest, after I have preached to others, I myself should be rejected.