The Banquet (Il Convito)

by Dante Alighieri

CHAPTER XV.

After the comparisons which I have made of the seven first Heavens, we must now proceed to the others, which are three, as has been often stated.

I say that the Starry Heaven may be compared to Physics because of three properties, and to Metaphysics because of three others. For it shows us of itself two visible things, such as the multitude of stars and such as the Galaxy, that white circle which the common people call the Path of St. James. It shows to us also one of the poles, and keeps the other hidden from us. And it shows to us one movement alone from East to West; and another, which it makes from West to East, it keeps almost, as it were, hidden from us. Therefore, in due order are to be seen, first the comparison with the Physical and then that with the Metaphysical.

I say that the Starry Heaven shows us many stars; for, according to what the wise men of Egypt have seen, even to the last star which appeared to them in the Meridian, they place there twenty-two thousand bodies of stars, of which I speak. And in this it has the greatest similitude with Physics, if these three numbers, namely, Two, and Twenty, and Thousand, are regarded well and subtly. For by the two is meant the local movement, which is of necessity from one point to another; and by the twenty is signified the movement of the alteration, for, since from the ten upwards one advances not except by altering this ten with the other nine and with itself; and the most beautiful alteration which it receives is its own with itself, and the first which it receives is the twenty; reasonably by this number the said movement is signified. And by the thousand is signified the movement of increase, which in name, that is, this thousand, is the greater number, and to increase still more is not possible except by multiplying this. And these three movements alone are observed in Physics, as it is demonstrated in the fifth chapter of his first book.

And because of the Milky Way, this Heaven has a great similitude with Metaphysics. Wherefore, it is to be known that concerning this Galaxy the Philosophers have had different opinions. For the followers of Pythagoras said that the Sun at some time or other went astray from his path, and, passing through other parts not suitable to his fervent heat, he burnt the place through which he passed, and there remained that appearance of the conflagration. And I believe that they were moved by the fable of Phaeton, which Ovid relates in the beginning of the second part of his Metamorphoses. Others said, such as Anaxagoras and Democritus, that it was the light of the Sun reflected into that part. And these opinions, with demonstrative reasons, they proved over and over again. What Aristotle may have said of this is not so easy to learn, because his opinion is not found to be the same in one translation as in the other; and I believe that it might be due to the error of the translators, for in the new one he seems to say that the Galaxy is a collection of vapours under the stars of that part which always attract them; and this does not seem to be the true reason. In the old translation he says that the Galaxy is no other than a multitude of fixed stars in that part, so small that we cannot distinguish them from here below, but that they cause the whiteness which we call the Milky Way. And it may be that the Heaven in that part is more dense, and therefore retains and represents that light; and this opinion Avicenna and Ptolemy seem to share with Aristotle. Therefore, since the Galaxy is an effect of those stars which we cannot see, if we understand those things by their effect alone, and Metaphysics treats of the first substances, which we cannot similarly understand except by their effects, it is evident that the Starry Heaven has a great similitude to Metaphysics.

Again, by the pole which we see is signified the things known to our senses, concerning which, taking them universally, the Science of Physics treats; and by the pole which we do not see is signified the things which are without matter, which are not sensible, concerning which Metaphysics treats; and therefore the said Heaven has a great similitude with the one Science and with the other.

Again, by the two movements it signifies these two Sciences: for by the movement in which every day revolves, and makes a new revolution from point to point, it signifies things natural and corruptible which daily complete their path, and their material is changed from form to form; and of this the Science of Physics treats. And by the almost insensible movement which it makes from West to East by one degree in a hundred years, it signifies things incorruptible, which received from God the beginning of their creation, and will have no end; but of these Metaphysics treats. Therefore I say that this movement signifies those things, for it began this revolution which will have no end; the end of the revolution being to return to one self-same point, to which this Heaven will not return by this movement, which has revolved a little more than the sixth part from the commencement of the world; and we are now in the last age of the world, and verily we wait the consummation of the celestial movement. Thus it is evident that the Starry Heaven, on account of many properties, may be compared to the Science of Physics and Metaphysics.

The Crystalline Heaven, which, as the Primum Mobile, has been previously counted, has a sufficiently evident comparison to Moral Philosophy; for Moral Philosophy, according to what Tommaso says upon the second book of the Ethics, teaches us method in the other Sciences.

For as the Philosopher says in the fifth book of the Ethics, legal Justice requires the Sciences to be learnt, and commands, in order that they may not be abandoned, that they be learnt and taught: thus, the said Heaven rules with its movement the daily revolution of all the others; from which revolution every day all those receive and send below the virtues of their several parts. For, if the revolution of this Heaven could not rule over that, but little of their power would descend below, and little of their aspect. Wherefore we hold that, if it could be possible for this ninth Heaven not to move, the third part of the Heaven would not again be seen in any part from the Earth: Saturn would be for fourteen years and a half concealed from any place on the Earth, Jupiter would be hidden for six years, and Mars for almost a whole year, and the Sun for one hundred and eighty-two days and fourteen hours (I say days, meaning so much time as so many days measure); and Venus and Mercury, almost like the Sun, would be hidden and would reappear, and the Moon for the space of fourteen days and a half would be hidden from all people. Verily, here below there would be neither generation, nor the life of animals, nor of plants; there would be no night, nor day, nor week, nor month, nor year; but the whole Universe would be disordered, and the movement of the stars would be in vain. Not otherwise, should Moral Philosophy cease to be, would the other Sciences be hidden for some time, and there would be no generation nor life of happiness, and all books would be in vain, and all discoveries of old. Therefore it is sufficiently evident that there is a comparison between this Heaven and Moral Philosophy.

Again, the Empyrean Heaven, because of its Peace, bears a similitude to the Divine Science, which is full of all Peace; which endures no conflict of opinion or of sophistical arguments, on account of the most excellent certainty of its subject, which is God. And of this He Himself speaks to His disciples: "My peace I give to you: My peace I leave unto you," giving and leaving to them His doctrine, which is this Science whereof I speak.

Solomon says of this Science: "Sixty are the queens, and eighty the friendly concubines; and youthful virgins without number; but one is my dove and my perfect one." All the Sciences he terms queens, and friends, and virgins; and he calls this one dove, because it is without blemish of strife; and he calls this one perfect, because it causes us to see perfectly the Truth in which our Soul finds Peace.

And therefore the comparison of the Heavens to the Sciences having been thus reasoned out, it is easy to see that by the Third Heaven I mean Rhetoric, which has been likened unto the Third Heaven, as appears above.