The first principle that pertains to the intelligence God has bestowed upon us is to know how to preserve the present organization with which we are endowed. It is man's first duty to his existence, a knowledge of which would cause him to use all prudent efforts for the preservation {289} of his life on the earth until his work here is completed. 8:281. Prepare to die, is not the exhortation in this Church and Kingdom; but prepare to live is the word with us, and improve all we can in the life hereafter, wherein we may enjoy a more exalted condition of intelligence, wisdom, light, knowledge, power, glory, and exaltation. Then let us seek to extend the present life to the uttermost, by observing every law of health, and by properly balancing labor, study, rest, and recreation, and thus prepare for a better life. Let us teach these principles to our children, that, in the morning of their days, they may be taught to lay the foundation of health and strength and constitution and power of life in their bodies. 11:132. This is the duty of the human family, instead of wasting their lives and the lives of their fellow-beings, and the precious time God has given us to improve our minds and bodies by observing the laws of life, so that the longevity of the human family may begin to return. By and by, according to the Scriptures, the days of a man shall be like the days of a tree. But in those days people will not eat and drink as they do now; if they do their days will not be like a tree, unless it be a very short-lived tree. This is our business. 14:89. We are trying to become natural in our habits, and are striving to fulfil the end and design of our creation. 13:233. The fathers and mothers have laid the foundation for many of these diseases, from generation to generation, until the people are reduced to their present condition. True, some live to from fifty to ninety years of age, but it is an unusual circumstance to see a man an hundred years old, or a woman ninety. The people have laid the foundation of {290} short life through their diet, their rest, their labor, and their doing this, that, and the other in a wrong manner, with improper motives, and at improper times. 2:269. You, mothers and daughters in Israel, who are taking this course, how do you expect to live to accomplish the work the Lord has assigned you? You get up in the morning and have your cup of tea, your fried ham, your cold beef and mince pies, and everything you can possibly cram into the stomach, until you surfeit the system and lay the foundation for disease and early death. Says the mother--"Do eat, my little daughter, you are sick; take a piece of pie, toast, or meat, or drink a little tea or coffee; you must take something or other." Mothers in Israel, such a course engenders disease, and you are laying a foundation that will cut off one-half or two-thirds of the lives of your children. 12:37.