The creation of luminous bodies.
The sun and moon thus received the command to divide the day from the night. God had already separated light from darkness; then He placed their natures in opposition, so that they could not mingle, and that there could never be anything in common between darkness and light. You see what a shadow is during the day; that is precisely the nature of darkness during the night. If, at the appearance of a light, the shadow always falls on the opposite side; if in the morning it extends towards the setting sun; if in the evening it inclines towards the rising sun, and at mid-day turns towards the north; night retires into the regions opposed to the rays of the sun, since it is by nature only the shadow of the earth. Because, in the same way that, during the day, shadow is produced by a body which intercepts the light, night comes naturally when the air which surrounds the earth is in shadow. And this is precisely what Scripture says, “God divided the light from the darkness.” Thus darkness fled at the approach of light, the two being at their first creation divided by a natural antipathy. Now God commanded the sun to measure the day, and the moon, whenever she rounds her disc, to rule the night. For then these two luminaries are almost diametrically opposed; when the sun rises, the full moon disappears from the horizon, to re-appear in the east at the moment the sun sets. It matters little to our subject if in other phases the light of the moon does not correspond exactly with night. It is none the less true, that when at its perfection it makes the stars to turn pale and lightens up the earth with the splendour of its light, it reigns over the night, and in concert with the sun divides the duration of it in equal parts.
4. “ And let them be for signs, and for seasons, and for days and years.” The signs which the luminaries give are necessary to human life. In fact what useful observations will long experience make us discover, if we ask without undue curiosity! What signs of rain, of drought, or of the rising of the wind, partial or general, violent or moderate! Our Lord indicates to us one of the signs given by the sun when He says, “It will be foul weather to-day; for the sky is red and lowering.” In fact, when the sun rises through a fog, its rays are darkened, but the disc appears burning like a coal and of a bloody red colour. It is the thickness of the air which causes this appearance; as the rays of the sun do not disperse such amassed and condensed air, it cannot certainly be retained by the waves of vapour which exhale from the earth, and it will cause from superabundance of moisture a storm in the countries over which it accumulates. In the same way, when the moon is surrounded with moisture, or when the sun is encircled with what is called a halo, it is the sign of heavy rain or of a violent storm; again, in the same way, if mock suns accompany the sun in its course they foretell certain celestial phenomena. Finally, those straight lines, like the colours of the rainbow, which are seen on the clouds, announce rain, extraordinary tempests, or, in one word, a complete change in the weather.
Those who devote themselves to the observation of these bodies find signs in the different phases of the moon, as if the air, by which the earth is enveloped, were obliged to vary to correspond with its change of form. Towards the third day of the new moon, if it is sharp and clear, it is a sign of fixed fine weather. If its horns appear thick and reddish it threatens us either with heavy rain or with a gale from the South. Who does not know how useful are these signs in life? Thanks to them, the sailor keeps back his vessel in the harbour, foreseeing the perils with which the winds threaten him, and the traveller beforehand takes shelter from harm, waiting until the weather has become fairer. Thanks to them, husbandmen, busy with sowing seed or cultivating plants, are able to know which seasons are favourable to their labours. Further, the Lord has announced to us that at the dissolution of the universe, signs will appear in the sun, in the moon and in the stars. The sun shall be turned into blood and the moon shall not give her light, signs of the consummation of all things.
5. But those who overstep the borders, making the words of Scripture their apology for the art of casting nativities, pretend that our lives depend upon the motion of the heavenly bodies, and that thus the Chaldæans read in the planets that which will happen to us. By these very simple words “let them be for signs,” they understand neither the variations of the weather, nor the change of seasons; they only see in them, at the will of their imagination, the distribution of human destinies. What do they say in reality? When the planets cross in the signs of the Zodiac, certain figures formed by their meeting give birth to certain destinies, and others produce different destinies.
Perhaps for clearness sake it is not useless to enter into more detail about this vain science. I will say nothing of my own to refute them; I will use their words, bringing a remedy for the infected, and for others a preservative from falling. The inventors of astrology seeing that in the extent of time many signs escaped them, divided it and enclosed each part in narrow limits, as if in the least and shortest interval, in a moment, in the twinkling of an eye, to speak with the Apostle, the greatest difference should be found between one birth and another. Such an one is born in this moment; he will be a prince over cities and will govern the people, in the fulness of riches and power. Another is born the instant after; he will be poor, miserable, and will wander daily from door to door begging his bread. Consequently they divide the Zodiac into twelve parts, and, as the sun takes thirty days to traverse each of the twelve divisions of this unerring circle, they divide them into thirty more. Each of them forms sixty new ones, and these last are again divided into sixty. Let us see then if, in determining the birth of an infant, it will be possible to observe this rigorous division of time. The child is born. The nurse ascertains the sex; then she awaits the wail which is a sign of its life. Until then how many moments have passed do you think? The nurse announces the birth of the child to the Chaldæan: how many minutes would you count before she opens her mouth, especially if he who records the hour is outside the women’s apartments? And we know that he who consults the dial, ought, whether by day or by night, to mark the hour with the most precise exactitude. What a swarm of seconds passes during this time! For the planet of nativity ought to be found, not only in one of the twelve divisions of the Zodiac, and even in one of its first subdivisions, but again in one of the sixtieth parts which divide this last, and even, to arrive at the exact truth, in one of the sixtieth subdivisions that this contains in its turn. And to obtain such minute knowledge, so impossible to grasp from this moment, each planet must be questioned to find its position as regards the signs of the Zodiac and the figures that the planets form at the moment of the child’s birth.
Thus, if it is impossible to find exactly the hour of birth, and if the least change can upset all, then both those who give themselves up to this imaginary science and those who listen to them open-mouthed, as if they could learn from them the future, are supremely ridiculous.
6. But what effects are produced? Such an one will have curly hair and bright eyes, because he is born under the Ram; such is the appearance of a ram. He will have noble feelings; because the Ram is born to command. He will be liberal and fertile in resources, because this animal gets rid of its fleece without trouble, and nature immediately hastens to reclothe it. Another is born under the Bull: he will be enured to hardship and of a slavish character, because the bull bows under the yoke. Another is born under the Scorpion; like to this venomous reptile he will be a striker. He who is born under the Balance will be just, thanks to the justness of our balances. Is not this the height of folly? This Ram, from whence you draw the nativity of man, is the twelfth part of the heaven, and in entering into it the sun reaches the spring. The Balance and the Bull are likewise twelfth parts of the Zodiac. How can you see there the principal causes which influence the life of man? And why do you take animals to characterize the manners of men who enter this world? He who is born under the Ram will be liberal, not because this part of heaven gives this characteristic, but because such is the nature of the beast. Why then should we frighten ourselves by the names of these stars and undertake to persuade ourselves with these bleatings? If heaven has different characteristics derived from these animals, it is then itself subject to external influences since its causes depend on the brutes who graze in our fields. A ridiculous assertion; but how much more ridiculous the pretence of arriving at the influence on each other of things which have not the least connexion! This pretended science is a true spider’s web; if a gnat or a fly, or some insect equally feeble falls into it it is held entangled; if a stronger animal approaches, it passes through without trouble, carrying the weak tissue away with it.