The mind is by far the greatest factor in maintaining the body in a healthy condition.

The social life of the city, the great opportunities afforded the mind for feeding upon libraries and lectures, great sermons, and constant association with other minds, the great variety of amusements compensate largely for the loss of many of the advantages of farm life.

In spite of the great temperance and immunity from things which corrode, whittle, and rasp away life in the cities, farmers in many places do not live so long as scientists and some other professional men.
There is no doubt that aspiration and success tend to prolong life.
Prosperity tends to longevity, if we do not wear life away or burn it out in the feverish pursuit of wealth.

Thomas W.Higginson made a list of thirty of the most noted preachers of the last century, and found that their average length of life was sixty-nine years.
Among miners in some sections over six hundred out of a thousand die from consumption.

In the prisons of Europe, where the fatal effects of bad air and filth are shown, over sixty-one per cent.