1 Corinthians 9:25-27

ACV(i) 25 And every man who strives for mastery exercises self-control in all things. Indeed therefore those men do it so that they might obtain a perishable crown, but we an imperishable. 26 I therefore run this way, not as aimlessly. I fight this way, not as flaying air. 27 But I give my body a black eye and subdue it, lest somehow having preached to others, I myself might become disqualified.