This section of the book is from the "Handbook of Nature Cure Volume One: Nature Cure vs. Medical Science" book, by John L. Fielder.
My treatise on a sober life has begun to answer my desire in being of service to many persons born with a weak constitution, who, every time they committed the least excess, found themselves greatly indisposed, a thing which it must be allowed does not happen to robust people. Several of these persons of weak constitutions, on seeing the foregoing treatise, have betaken themselves to a regular course of life, convinced by the experience of its utility. In like manner I should be glad to be of service to those who are born with a good constitution and, presuming upon it, lead a disorderly life; whence it comes to pass, that, on their attaining the age of sixty or thereabouts, they are attacked with various pains and diseases—some with gout, some with pains in the side, and others with pains in the stomach, and the like—to which they would not be subject were they to embrace a sober life; and as most of them die before they attain their eightieth year, they would live to be a hundred, the time allowed to man by God and Nature. And it is but reasonable to believe that the intention of this our mother is that we should attain that term, in order that we might all taste the sweets of every state of life. But, as our birthright is subject to the revolutions of the heavens, these have great influence over it, especially in rendering our constitutions firm or infirm—a thing which Nature cannot ward against, for if she could we would all bring a good constitution with us into the world. But then she hopes that man, being endowed with reason and understanding, may of himself compensate, by dint of art, the want of that which the heavens have denied him; and, by means of a sober life, contrive to mend his infirm constitution, live to a great age, and always enjoy good health.