God's Word is our spiritual nourishment. It gives us the daily stamina we need to resolve problems in our relationships, our homes, and our jobs. In addition to getting proper nourishment, we must avoid things which are detrimental to our health, such as smoking and drinking. Lie not one to another. Just as regular exercise is essential to our physical well-being, prayer is of utmost importance to our spiritual vitality.
Exercise strengthens our muscles.
Prayer strengthens us to resist temptations. God has planned for us to live balanced lives, but because we are human, it is easy for us to go to one extreme or the other. A controlled, disciplined spiritual life will result in a controlled, disciplined physical life. If Jesus is truly our Lord, He will control every aspect of our lives. If we are to give God a sacrifice, we want to give Him the purest the best.