1 Coríntios 9

24 Know ye not that those who run in a race indeed all run, but one receives the prize? So run, that ye may obtain [it].

25 And every man that strives for the mastery is temperate in all things. Now they [do it] to obtain a corruptible crown, but we, an incorruptible [one].

26 I therefore so run, not as unto an uncertain thing; so I fight, not as one that beats the air;

27 but I keep my body under, and bring [it] into subjection, lest preaching to others, I myself should become reprobate.: