Observing the old doctor jogging along the country roads visiting his far-scattered patients, it occurred to Grenfell that here was not only a pleasant but a useful profession. With his knowledge of medicine the doctor assisted nature in restoring people to health. Man must have a well body if he would be happy and useful. Without a well body man's hands would be idle and his brain dull. Only healthy men could invent and build and administer. It was the doctor's job to keep them fit. Here then was creative work of the highest kind! The thought thrilled him!
Every boy of the right sort yearns to be of the greatest possible use in the world. Unselfishness is a natural instinct. Boys are not born selfish. They grow selfish because of association or training, and because they see others about
