He says: "Although reason should convince them that this is the case, yet these men refuse to admit it, and pursue their usual life of disorder as heretofore. Were they to act differently, abandoning their irregular habits and adopting orderly and temperate ones, they would live to old age--as I have--in good condition. Being, by the grace of God, of so robust and perfect a constitution, they would live until they reached the age of a hundred and twenty, as history points out to us that others--born, of course, with perfect constitutions--have done, who led the temperate life. "I am certain I, too, should live to that age had it been my good fortune to receive a similar blessing at my birth; but, because I was born with a poor constitution, I fear I shall not live much beyond a hundred years." According to the census of the United States not one man in twenty thousand attains the age of one hundred years. If we figure out carefully from these statistics, we find the average is only about one-third of this period of life. One of the social customs is that we must eat an extraordinary meal,--far more than we need, as if life's enjoyment depended on the low sense of taste,--as if every contract or matter of important business must have this as an introduction. Theoretically speaking, many people believe in low living and high thinking, but it is very rare that we find one who practices it. The two simple rules of Cornaro deserve our attention: to eat only what he wanted, that is, what he actually needed for the sustenance of his body, and to eat only those things which really agreed with him, that is, those which were really helpful to the sustenance of his life. If we should consider eating merely as a means and not an end, Cornaro's idea that the normal age of a human being was one hundred and twenty years would not be such a wild dream. Another almost universally recognized requisite is exercise in the open air, or regular, systematic, simple and vigorous activity of some kind. The necessity of thoroughly pure air must be emphasized from first to last. Some think that the dullness felt by many people in the early morning is due to the impure air of cities, and to the failure to open windows. A lady once said to me, "When I am in the country I always sleep out of doors. Then I have not the slightest disinclination to get up. I do it as naturally and as gladly as the animals." It is to be hoped that the rapid transit and the automobile will enable people to live farther out in the country, farther from air poisoned by smoke and gases. Even in cities, however, one may have open windows and greater circulation of air than is common. Some have gone so far as to place exercise over against temperance in eating, saying that if you take enough exercise you may eat and drink what you please. While there is some truth in this there is really no antagonism between them; in fact, they are usually found together.