The price we pay for defective nerves is one of mankind's big burdens. Humanity reaches its vaunted supremacy, it realizes the heights of manhood and womanhood through its power to meet what the day brings, to collect the best therefrom and to fit itself profitably to use that best for the good of its kind. And these possibilities are all dependent on the superb, complicated nervous system. The miracles of right and wise living are rooted deep in the nerve-centers. Man's nervous system is his adjusting mechanism--his indicator revealing the proper methods of reaction.