First Nephi 19:7
What are some things that Nephi esteemed to be of great worth - especially to the body? He must have taken good care of his physical health, he certainly ate healthy - fruits, grains, honey, meat. What do you esteem to be of great worth to the body? Following the word of wisdom (D&C 89) is of great worth. Avoidance of addictions, eating healthy foods, regular fasting, plenty of sleep - retiring and arising early, and regular exercise is of great worth to the body. Let's not be guilty of setting these things at naught and trampling them under our feet.