How long man remained in the first estate, is not known. Undoubtedly, however, it was long enough to enable him to become thoroughly familiar with the manifestations of all forms of spirit substance. Only when education in this division of the universe was completed were we permitted to enter the next estate. **The Second Estate.** The kind of matter characteristic of this earth and the so-called material universe, also forms an important part of the universe. No spirit can acquire real mastery over the universe until this form of matter is so thoroughly understood as to be used and governed. The next step in the education of these intelligent beings was therefore to teach them familiarity with gross matter. Consequently, the spirits passed out of the spirit world, and were born into the world of earthly things, the world we now occupy, as men and women clothed upon by a body consisting of gross matter, so that intimate familiarity with the nature and possibilities of gross matter might be acquired. This is called the second estate of man. The business of man is to become so thoroughly acquainted with earth conditions, that through the possession of an earthly body, he may go on, forever. **The Third Estate.** We pass out of this, but reappear in another world, for a brief time separated from our earth-won body, but finally possessing bodies of both kinds of universal matter. In this estate, both the spirit matter and the grosser matter composing our final bodies are represented by their essences, and therefore permit perfect freedom and ease of movement and thought. These celestial bodies, as they are called, connect the intelligence with all parts of the universe, and become mighty helps in the endless search for truth. This is the third estate of man. Such then are the three estates, and as far as known, all the estates of man. Whether the outline, as here presented, in its details, is precise or not, matters little. The essential thing is that man has to undergo experience upon experience, to attain the desired mastery of the external universe; and that we, of this earth, are passing through an estate designed wholly for our further education. **Everlasting Joy.** It follows that, in each estate, with each onward step, a profounder knowledge of the laws of nature is attained. When conscious, active wills are thus at work, the new knowledge makes possible a more perfect adaptation of man to law. The more completely law is obeyed the greater the consciousness of perfect joy. Throughout eternal life, increasing knowledge is attained, and with increasing knowledge comes the greater adaptation to law, and in the end an increasingly greater joy. Therefore it is that eternal life is the greatest gift of God, and that the plan of salvation is priceless. CHAPTER 8. MAN'S FREE AGENCY.