Only five responses were affirmative to this question. One of the most eminent men of science with a world-wide reputation reported, at seventy-two, that he had never worked so effectively and was now engaged on a program that would require from ten to twenty years of strenuous activity for its completion, besides answering several scores of letters daily. Another scarcely less eminent, at the age of seventy-three, had lately undertaken an arduous line of investigation that would “require many years to complete” but was confident that he could finish it, for “a task is a life-preserver.” My returns suggest that men engaged in scientific research have more power to “carry on” than any other class and that those engaged in the professions are perhaps least likely to do so when they cease active practice. Several specify greater mental clarity in seeing through delusions, shams, and vanities. Others feel a certain exaltation at times, dependent perhaps upon digestion or the weather. Others specify new and deeper self-knowledge. Others find much satisfaction in the settling of a few fixed and cardinal ideas or convictions. A few feel new ambitions to begin new enterprises. Several found in the war and its results a mental stimulus that they felt to be rejuvenating and longed and believed that they must live on to see the settlement of some of the great questions now so wide open. Four had observed such awakenings in others. Most, however, felt themselves going on about as before, with no change save gradual abatement of energy. Some felt as strong physically and mentally as ever until they set themselves to some serious task and then realized that this feeling was illusory. Others were sure they would have felt a revival of springtide but for some infirmity or disaster. It is, however, hard for others to judge on this matter and harder perhaps for the individual to answer the question for himself. The remission of responsibilities and the dropping of burdens would of itself give a certain sense of exaltation, because all such changes involve a new balance between ambitions and accomplishments. Retired clergymen often feel a great relief from being no longer accountable to others for their opinions and some often find a joyful sense of emancipation from old doctrines surprising, not only to others but most of all to themselves. One writes, “I found, on sober second thought, I no longer really believed certain dogmas I had preached all my life and that in my inmost heart I really believed certain things I had often condemned as heresies.” He found an intense mental stimulus in thus reconstructing his own creed. A clergyman of seventy-nine once told me he had ceased to preach, even as a supply, because since his resignation his new views gave offense. Old physicians, too, sometimes, though far more rarely and to a less extent, drop as illusions certain fundamental principles by which the practice of a lifetime had been regulated.