That is also mentioned in the Bible. We are not supposed only to exist but to learn to conquer own mind, discipline own heart and nature. Face obstacles in life with respect, learn meaning of courage and honour and that all flows as a result of conquering self!
If you're looking for a little inspiration to help with your fitness and weightloss goals, this collection of 25 fitness motivation quotes will give you the boost you need. I chant # 10 to myself daily, and # 19 makes running on the treadmill seem less painful. ;)