One stands each moment upon the threshold between the past and the future. It is for him to decide which shall claim his thought. Youth dwells upon the future, because the future holds its hopes and plans. Age dwells upon the past, because the past holds the memory of its activities and kindred ties. While one keeps his face to the future, he remains young. When he begins to live in the past, he is allowing himself to grow old. There is a sweetness about an occasional hour spent in roaming the halls of memory, but in to-morrow lie life’s supreme considerations. Those who keep thinking and toiling grow old more slowly than do those who relinquish their hold upon the activities and the concerns of life. Body and spirit alike begin the process of atrophy on the day when interests begin to decay. When the mind and the hand pass to rest, the body may be expected to soon share their slumber. This is the reason why so many busy people grow old so courageously. It also suggests the reason why so many fail to long outlive their active days. Only while the mind craves knowledge and the heart feels the throb of the social impulse does the eye remain undimmed and the natural force unabated. A second path to the fountain of youth is that of right living. This is not merely implicit obedience to arbitrary law. It is living in harmony with the universe. Without it youth can never long remain. A very marked type of divine healing is to be found in the abounding health which is the result of living in accord with the divine laws of nature. The finest instances of that healing are perhaps to be found in the absence of diseases that have never occurred. In other words, its chief usefulness is preventive. In a wholly Christian race of men there would be but a minimum of disease. Insurance companies understand this fact. The physical decay of the body is chiefly the result of inroads made by disease, and the greatest fostering influence of disease is wrongdoing. Both directly and indirectly, sin works havoc with mankind. Physical abnormalities root in someone’s disregard for established laws. In one case the sin may be one of intentional wrongdoing, and in another it may be the equally disastrous one of common ignorance and carelessness. The Hebrews furnish a notable instance of racial vitality. They are what they are to-day largely as a result of the fact that their remote forefathers were born and nurtured in camps and cities where uncleanness was a disgrace and where a violation of the laws of life was a sin. The laws of right living are not merely a list of arbitrary regulations, the highest design of which is to prove the willingness of men to obey them. They are the provisions of a kind Providence for humanity’s own welfare and progress.