"Astronomy's mission will be still higher. After making you know and feel that the Earth is but a city in the celestial country, and man a citizen of heaven, she will go still farther. Disclosing the plan on which the physical universe is constructed, she will show that the moral universe is constructed on the very same basis, that the two worlds form but one world, and that mind governs matter. What she will have done for space she will do for time. After realizing the boundlessness of space, and recognizing that the same laws govern all places simultaneously and make the vast universe one grand unit, you will learn that the centuries of the past and of the future are linked with the present, and that thinking monads will live forever through successive and progressive changes. You will learn that minds exist incomparably superior to the greatest minds of earthly humanity, and that all things advance toward supreme perfection. You will learn too that the material form is but an appearance, and that the real being consists of an imponderable, intangible, and invisible form. "Astronomy will then be eminently and above all else the directress of philosophy. Those who reason without astronomical knowledge will never reach the truth. Those who follow her beacon faithfully will gradually rise to the solutions of the greatest problems. "Astronomical philosophy will be the religion of lofty minds. "You will see this double transformation in science," she added, "when you leave the terrestrial globe; the astronomical knowledge which you already so justly prize will be entirely remodelled in form as well as spirit. "But this is not all. The renewal of an old science will be of little use to mankind in general if these sublime truths which develop the mind, enlighten the soul, and free it from vulgar common-place should be kept shut up within the narrow limits of professional astronomers. This time too will pass away. We must begin anew. The torch must be taken in hand, and its glory increased by carrying it into the busy streets and public squares. Every one is called to receive the light, every one is thirsting for it,--especially the humble, those on whom fortune frowns, for these are the persons who think most; these are eager for knowledge, while the contented ones of the century do not suspect their own ignorance, and are almost proud of staying in it. Yes, the light of astronomy must be diffused throughout the world; it must filter through the strata of humanity to the popular masses, enlighten their consciences, elevate their hearts. That will be its most beautiful and its grandest, greatest mission!" [Illustration] [Illustration] V. THE LIGHT OF THE PAST. Thus spoke my celestial guide. Her face was glorious as the day, her eyes shone with a starry lustre, her voice was like divine music. I looked at the worlds about us revolving in space, and felt that a mighty harmony controlled the course of Nature.