And every man that striveth for the mastery is temperate in all things. Now they do it to obtain a corruptible crown; but we an incorruptible.
I therefore so run, not as uncertainly; so fight I, not as one that beateth the air.
But I keep under my body, and bring it into subjection; lest that by any means, when I have preached to others, I myself should be a castaway.
– The Bible
1 Corinthians 9:25-27