I recently invited my children to go on a jog with me through the neighborhood.  Strong-willed, growing, and full of energy, they turned the jog into a competition.  As we began the route, one of my sons took off full speed trying to outdo his brother.  We watched as he sped hundreds of feet ahead.  Occasionally he would turn back and give us a smile as though he was winning.  It did not take him long to realize that he could not keep that pace up for 2.5 miles.

Once we caught up to him, he was so winded that …