3. I have occasionally spoken on this subject with the spirits of our earth, and it was said that any man of keen understanding may conclude from many things that he knows that there are many earths, and that there are men there; for it may be concluded from reason that such great masses as the planets are, some of which exceed this earth in magnitude, are not empty n, asses, and created only to be conveyed in their revolutions round the sun, and to shine with their scanty light for one earth, but that their use must needs be more excellent than that. He who believes, as every one ought to believe, that the Divine created the universe for no other end than that the human race may exist, and thence heaven, for the human race is the seminary of heaven, must needs believe also, that wherever there is an earth, there are men. That the planets which are visible to our eyes, as being within the boundaries of this solar system, are earths, may be manifestly known from this, that they are bodies of earthy matter, because they reflect the light of the sun, and when seen through optical glasses, they appear, not as stars glittering by reason of their flame, but as earths variegated from darker portions. The same may further appear from this, that they, in like manner as our earth, are conveyed by a progressive motion round the sun, in the way of the zodiac, whence they have their years, and seasons of the year, as spring, summer, autumn, and winter; and in like manner, as our earth, revolve about their own axis, whence they have their days, and times of the day, as morning, noon, evening and night. Moreover some of them have moons, which are called satellites, and which revolve round their globes at stated times, as the moon does round our earth. Also the planet Saturn has besides a large luminous belt, because it is very far distant from the sun, which belt supplies that earth with much light, although reflected. Who that knows these things and from reason thinks about them can say that these are empty bodies?