Endurance

Most people, including many Christians, are instead slaves to their bodies. Their bodies tell their minds what to do. Their bodies decide when to eat, what to eat, how much to eat, when to sleep and get up, and so on. An athlete cannot allow that. He follows the training rules, not his body. He runs when he would rather be resting, he eats a balanced meal when he would rather have a chocolate sundae, he goes to bed when he would rather stay up, and he gets up early to train when he would rather stay in bed. An athlete leads his body; he does not follow it. It is his slave, not the other way around.

To read the entire sermon click on this link:
  http://bible.org/seriespage/living-gods-approval-1-corinthians-924-27