1 Coríntios 9

24 Know you not that they who run in a race all run, but one receives the prize? So run, that you may obtain.

25 And every man that strives for self control is temperate in all things. Now they do it to obtain a corruptible crown; but we an incorruptible.

26 I therefore so run, not with uncertainty; so fight I, not as one that beats the air:

27 But I roughly treat my body, and bring it into subjection: lest that by any means, when I have preached to others, I myself should be disqualified.