Genesis 1:14

After Moses spoke about the gathering of the waters and about the sprouting of the vegetation on the earth on the third day, he turned to write about the lights that were created in the firmament saying, "And God said, 'Let there be lights in the firmament of the heavens to separate the day from the night'," [ Gen1:14 ] that is, one to rule over the day and the other [ to rule ] over the night.

That [ God ] said, "Let them be for signs," [ Gen1:14 ] [ refers to ] measures of time, and "let them be for seasons," clearly indicates summer and winter. "Let them be for days," are measured by the rising and setting of the sun, and "let them be for years," are comprised of the daily cycles of the sun and the monthly cycles of the moon.

We have spoken about signs. By times, we understand the succession of seasons, winter, spring, summer and autumn, which we see follow each other in so regular a course, thanks to the regularity of the movement of the luminaries. It is winter when the sun sojourns in the south and produces in abundance the shades of night in our region. The air spread over the earth is chilly, and the damp exhalations, which gather over our heads, give rise to rains, to frosts, to innumerable flakes of snow. When, returning from the southern regions, the sun is in the middle of the heavens and divides day and night into equal parts, the more it sojourns above the earth the more it brings back a mild temperature to us. Then comes spring, which makes all the plants germinate, and gives to the greater part of the trees their new life, and, by successive generation, perpetuates all the land and water animals. From thence the sun, returning to the summer solstice, in the direction of the North, gives us the longest days. And, as it travels farther in the air, it burns that which is over our heads, dries up the earth, ripens the grains and hastens the maturity of the fruits of the trees. At the epoch of its greatest heat, the shadows which the sun makes at mid-day are short, because it shines from above, from the air over our heads. Thus the longest days are those when the shadows are shortest, in the same way that the shortest days are those when the shadows are longest. It is this which happens to all of us Hetero-skii (shadowed-on-one-side) who inhabit the northern regions of the earth. But there are people who, two days in the year, are completely without shade at mid-day, because the sun, being perpendicularly over their heads, lights them so equally from all sides, that it could through a narrow opening shine at the bottom of a well. Thus there are some who call them askii (shadowless). For those who live beyond the land of spices see their shadow now on one side, now on another, the only inhabitants of this land of which the shade falls at mid-day; thus they are given the name of amphiskii, (shadowed-on-both-sides). All these phenomena happen while the sun is passing into northern regions: they give us an idea of the heat thrown on the air, by the rays of the sun and of the effects that they produce. Next we pass to autumn, which breaks up the excessive heat, lessening the warmth little by little, and by a moderate temperature brings us back without suffering to winter, to the time when the sun returns from the northern regions to the southern. It is thus that seasons, following the course of the sun, succeed each other to rule our life.

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 connection! 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.

says Scripture, not to produce them but to rule them; because day and night are older than the creation of the luminaries and it is this that the psalm declares to us. The sun to rule by day...the moon and stars to rule by night. How does the sun rule by day? Because carrying everywhere light with it, it is no sooner risen above the horizon than it drives away darkness and brings us day. Thus we might, without self deception, define day as air lighted by the sun, or as the space of time that the sun passes in our hemisphere. The functions of the sun and moon serve further to mark years. The moon, after having twelve times run her course, forms a year which sometimes needs an intercalary month to make it exactly agree with the seasons. Such was formerly the year of the Hebrews and of the early Greeks. As to the solar year, it is the time that the sun, having started from a certain sign, takes to return to it in its normal progress.

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, 1 Corinthians 15:52 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 fullness 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.

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 today; for the sky is red and lowering. Matthew 16:3 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.

3. And let no one suppose it to be a thing incredible that the brightness of the light is one thing, and the body which is its material vehicle is another. First, in all composite things, we distinguish substance susceptible of quality, and the quality which it receives. The nature of whiteness is one thing, another is that of the body which is whitened; thus the natures differ which we have just seen reunited by the power of the Creator. And do not tell me that it is impossible to separate them. Even I do not pretend to be able to separate light from the body of the sun; but I maintain that that which we separate in thought, may be separated in reality by the Creator of nature. You cannot, moreover, separate the brightness of fire from the virtue of burning which it possesses; but God, who wished to attract His servant by a wonderful sight, set a fire in the burning bush, which displayed all the brilliancy of flame while its devouring property was dormant. It is that which the Psalmist affirms in saying The voice of the Lord divides the flames of fire. Thus, in the requital which awaits us after this life, a mysterious voice seems to tell us that the double nature of fire will be divided; the just will enjoy its light, and the torment of its heat will be the torture of the wicked.

In the revolutions of the moon we find anew proof of what we have advanced. When it stops and grows less it does not consume itself in all its body, but in the measure that it deposits or absorbs the light which surrounds it, it presents to us the image of its decrease or of its increase. If we wish an evident proof that the moon does not consume its body when at rest, we have only to open our eyes. If you look at it in a cloudless and clear sky, you observe, when it has taken the complete form of a crescent, that the part, which is dark and not lighted up, describes a circle equal to that which the full moon forms. Thus the eye can take in the whole circle, if it adds to the illuminated part this obscure and dark curve. And do not tell me that the light of the moon is borrowed, diminishing or increasing in proportion as it approaches or recedes from the sun. That is not now the object of our research; we only wish to prove that its body differs from the light which makes it shine. I wish you to have the same idea of the sun; except however that the one, after having once received light and having mixed it with its substance, does not lay it down again, while the other, turn by turn, putting off and reclothing itself again with light, proves by that which takes place in itself what we have said of the sun.

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.

“Let them serve,” he says, “for the fixing of days,” not for making days but for ordering the days. For day and night are earlier than the generation of the luminaries. This the psalm declares to us when it says: “He placed the sun to rule the day, the moon and stars to rule the night.” How, then, does the sun rule the day? Because, whenever the sun, carrying the light around with it, rises above our horizon, it puts an end to the darkness and brings us the day. Therefore one would not err if he would define the day as air, lighted by the sun, or as the measure of time in which the sun tarries in the hemisphere above the earth. But the sun and the moon were also appointed to be for the years. The moon, when it has completed its course twelve times, measures a year, except that it frequently needs an intercalary month for the accurate determination of the seasons, as the Hebrews and the most ancient Greeks formerly measured the year. The solar year is the return of the sun from a certain sign to that same sign in its regular revolution.

Heaven and earth were the first; after them was created light; the day had been distinguished from the night, then had appeared the firmament and the dry element. The water had been gathered into the reservoir assigned to it, the earth displayed its productions, it had caused many kinds of herbs to germinate and it was adorned with all kinds of plants. However, the sun and the moon did not yet exist, in order that those who live in ignorance of God may not consider the sun as the origin and the father of light, or as the maker of all that grows out of the earth. That is why there was a fourth day, and then God said: Let there be lights in the firmament of the heaven.

When once you have learned Who spoke, think immediately of the hearer. God said, Let there be lights...and God made two great lights. Who spoke? And Who made? Do you not see a double person? Everywhere, in mystic language, history is sown with the dogmas of theology.

The motive follows which caused the lights to be created. It was to illuminate the earth. Already light was created; why therefore say that the sun was created to give light? And, first, do not laugh at the strangeness of this expression. We do not follow your nicety about words, and we trouble ourselves but little to give them a harmonious turn. Our writers do not amuse themselves by polishing their periods, and everywhere we prefer clearness of words to sonorous expressions. See then if by this expression to light up, the sacred writer sufficiently made his thought understood. He has put to give light instead of illumination. Now there is nothing here contradictory to what has been said of light. Then the actual nature of light was produced: now the sun's body is constructed to be a vehicle for that original light. A lamp is not fire. Fire has the property of illuminating, and we have invented the lamp to light us in darkness. In the same way, the luminous bodies have been fashioned as a vehicle for that pure, clear, and immaterial light. The Apostle speaks to us of certain lights which shine in the world without being confounded with the true light of the world, the possession of which made the saints luminaries of the souls which they instructed and drew from the darkness of ignorance. This is why the Creator of all things, made the sun in addition to that glorious light, and placed it shining in the heavens.

7. They do not, however, stop here; even our acts, where each one feels his will ruling, I mean, the practice of virtue or of vice, depend, according to them, on the influence of celestial bodies. It would be ridiculous seriously to refute such an error, but, as it holds a great many in its nets, perhaps it is better not to pass it over in silence. I would first ask them if the figures which the stars describe do not change a thousand times a day. In the perpetual motion of planets, some meet in a more rapid course, others make slower revolutions, and often in an hour we see them look at each other and then hide themselves. Now, at the hour of birth, it is very important whether one is looked upon by a beneficent star or by an evil one, to speak their language. Often then the astrologers do not seize the moment when a good star shows itself, and, on account of having let this fugitive moment escape, they enrol the newborn under the influence of a bad genius. I am compelled to use their own words. What madness! But, above all, what impiety! For the evil stars throw the blame of their wickedness upon Him Who made them. If evil is inherent in their nature, the Creator is the author of evil. If they make it themselves, they are animals endowed with the power of choice, whose acts will be free and voluntary. Is it not the height of folly to tell these lies about beings without souls? Again, what a want of sense does it show to distribute good and evil without regard to personal merit; to say that a star is beneficent because it occupies a certain place; that it becomes evil, because it is viewed by another star; and that if it moves ever so little from this figure it loses its malign influence.

But let us pass on. If, at every instant of duration, the stars vary their figures, then in these thousand changes, many times a day, there ought to be reproduced the configuration of royal births. Why then does not every day see the birth of a king? Why is there a succession on the throne from father to son? Without doubt there has never been a king who has taken measures to have his son born under the star of royalty. For what man possesses such a power? How then did Uzziah beget Jotham, Jotham Ahaz, Ahaz Hezekiah? And by what chance did the birth of none of them happen in an hour of slavery? If the origin of our virtues and of our vices is not in ourselves, but is the fatal consequence of our birth, it is useless for legislators to prescribe for us what we ought to do, and what we ought to avoid; it is useless for judges to honour virtue and to punish vice. The guilt is not in the robber, not in the assassin: it was willed for him; it was impossible for him to hold back his hand, urged to evil by inevitable necessity. Those who laboriously cultivate the arts are the maddest of men. The labourer will make an abundant harvest without sowing seed and without sharpening his sickle. Whether he wishes it or not, the merchant will make his fortune, and will be flooded with riches by fate. As for us Christians, we shall see our great hopes vanish, since from the moment that man does not act with freedom, there is neither reward for justice, nor punishment for sin. Under the reign of necessity and of fatality there is no place for merit, the first condition of all righteous judgment. But let us stop. You who are sound in yourselves have no need to hear more, and time does not allow us to make attacks without limit against these unhappy men.

Men ought to have been astonished and amazed not only at the arrangement of the sun and moon but also at the well-ordered movements of the stars and their unfettered courses and the timely rising of each of them; how some are signs of summer, others of winter; how some indicate the time for sowing, others the times of navigation.

Look first on the firmament of heaven, which was made before the sun. Look first on the earth, which began to be visible and was already formed before the sun put in its appearance. Look at the plants of the earth, which preceded in time the light of the sun. The bramble preceded the sun. The blade of grass is older than the moon. Therefore, do not believe that object to be a god to which the gifts of God are seen to be preferred. Three days have passed. No one, meanwhile, has looked for the sun, yet the brilliance of light has been in evidence everywhere. For the day too has its light, which is itself the precursor of the sun.

For that reason the blessed Moses, inspired by the divine Spirit, teaches us with great precision, lest we fall victim to the same things as they, instead of being able to know clearly both the sequence of created things and how each thing was created. You see, if God in his care for our salvation had not directed the tongue of the biblical author in this way, it would have been sufficient to say that God made heaven and earth, the sea and living things, and not add the order of the days nor what was created first and what later.

We should not interpret the signs as something other than times. For Scripture is now speaking of these times that by their distinct intervals convey to us that eternity remains immutable above them so that time might appear as a sign, that is, as a vestige of eternity. Likewise, when it adds, "and for days and for years," it shows of what times it is speaking. These days come about by the revolution of the fixed stars, and from this it becomes obvious when the sun completes its starry course in a particular year.

Everyone understands that there is a great difference between astrological prediction and observing the stars as natural phenomena, in the way that farmers and sailors do, either to verify geographical areas or to steer their course somewhere, as pilots of ships do, and travelers, making their way through the sandy wastes of the south with no sure path; or to explain some point of doctrine by mentioning some of the stars as a useful illustration. As I said, there is a great difference between these practical customs and the superstitions of men who study the stars not to forecast the weather or to find their way or for spiritual parables but in an effort to peer into the predestined outcome of events.

Therefore God said, "Let there be lights in the firmament of the heaven, to divide the day from the night." That is, by the division which is explained more clearly in what follows, that the sun indeed should illuminate the day, but the moon and the stars the night. For this addition of lights to the sky, which occurred after the primary light was made, was so that the night would also advance luminously, either by the splendor of the moon, or by the stars, or irradiated by both, which until then had known nothing but ancient darkness. For even if the night often appears dark and blind to us, obviously obscured by nebulous whirlwinds in the air that is closest to the earth, those higher spaces, which are designated by the name aether, which extend from this turbulent air up to the starry heaven, always shine brightly due to the circling stars. But also, by the divine gift, the stars arising in the sky offered their light with added brilliance to the world, so that the distinction of passing times could also be recognized by them; whence it follows.

And let them be for signs, and for seasons, and for days and years. Because, of course, before the stars were made, there were none by which the order of times could be marked by indications; there was nothing from where the meridian hour could be recognized, before the fiery orb climbed the middle of the sky; nothing from where the other hours of day and night could be marked, until the stars divided the sky by equal allotment in day and night. Therefore, the luminaries are for signs and seasons and days and years, not because from their creation times began, which evidently started from the beginning when God made heaven and earth; nor days and years, which are known to have originated from when God said: Let there be light, and there was light; but because through their risings or crossings the order of times and days and years is marked. For that entire earlier period of three days passed with an indistinct course of its progress, having entirely no dimension of hours, since the primary light was still generally filling everything, having no head, which is now received from the sun, no rays shone brighter anywhere, no shadow cooled under any rock or tree. But besides the marking of times, the luminaries are for signs necessary for the uses of this life, which either sailors in steering or those traveling in the sandy deserts of Ethiopia observe, where even a very slight wind quickly flattens all tracks found of travelers. And therefore those going in those regions need no less, than those navigating the sea, signs of the stars by night and day. There are also signs by which we sometimes foresee the quality of the weather to come through their contemplation.

And God said, "Let there be lights in the firmament of the heaven." The world proceeds in fitting order from formless matter to suitable form. For after God created heaven and earth and water before any day of this age, that is, the higher and spiritual world with its inhabitants, and the formless matter of this whole world, according to what is written: "He who lives forever created all things at once" (Ecclesiasticus 18:1); on the first day of this age, He made light, which would make the other creatures capable of form. On the second day, He solidified the firmament of heaven, that is, the upper part of this world, in the midst of the waters. On the third day, He separated the sea and the lands within their boundaries and spread the air in its places, with the water receding. It was fitting, therefore, that the elements should advance in the same order in which they were created to a more ample ornamentation, that is, on the fourth day the sky would be adorned with lights. On the fifth day, the air and sea, and on the sixth day, the land, would be filled with their animals. For the fact that on the third day the earth was covered with herbs and trees pertains not to its ornamentation but to the very surface of its form, if I may say so.

Fire is one of the four elements. It is light and more buoyant than the others, and it both burns and gives light. It was made by the Creator on the first day, for sacred Scripture says, “And God said: Be light made. And light was made.” According to what some say, fire is the same thing as light.… And into the luminaries of the firmament the Creator put the primordial light, not that he was in want of any other light but that that particular light might not remain idle. For the luminary is not the light itself but its receptacle.

Let there be lights made in the firmament: Some might say that the lights should have been produced at the same time as the firmament, that is to say, on the second day. But Moses describes what is obvious to sense, out of condescension to popular ignorance, as we have already said (67, 4; 68, 3). For although to the senses there appears but one firmament; if we admit a higher and a lower firmament, the lower will be that which was made on the second day, and on the fourth the stars were fixed in the higher firmament.
According to Ptolemy the heavenly luminaries are not fixed in the spheres, but have their own movement distinct from the movement of the spheres. Wherefore Chrysostom says (Hom. vi in Gen.) that He is said to have set them in the firmament, not because He fixed them there immovably, but because He bade them to be there, even as He placed man in Paradise, to be there.
Lights: Damascene says (De Fide Orth. ii), "Let no one esteem the heavens or the heavenly bodies to be living things, for they have neither life nor sense." On the other hand, the Platonists held that the heavenly bodies have life. Nor was there less diversity of opinion among the Doctors of the Church. It was the belief of Origen (Peri Archon i) and Jerome that these bodies were alive, and the latter seems to explain in that sense the words (Ecclesiastes 1:6), "The spirit goeth forward, surveying all places round about." But Basil (Hom. iii, vi in Hexaem.) and Damascene (De Fide Orth. ii) maintain that the heavenly bodies are inanimate. Augustine leaves the matter in doubt, without committing himself to either theory, though he goes so far as to say that if the heavenly bodies are really living beings, their souls must be akin to the angelic nature (Gen. ad lit. ii, 18; Enchiridion lviii).
and let them be for signs: as regards the convenience of business and work, in so far as the lights are set in the heavens to indicate fair or foul weather, as favorable to various occupations.
Let them be for seasons, and for days, and years: as regards the changes of the seasons, which prevent weariness, preserve health, and provide for the necessities of food; all of which things could not be secured if it were always summer or winter.