Bede : To shine upon the earth, and to rule over the day and the night, and to divide the light and the darkness. These things can be understood both about the great lights and about the stars with this distinction only, that what is said "to rule over the day" refers especially to the sun; what is added "and the night" pertains to the moon and the stars; but what is further stated "and to separate the light from the darkness" applies equally to all the stars, which carry light wherever they move and leave all things dark where they are absent. But if anyone inquires what kind of light could have existed by day before the creation of the stars, it might reasonably be said that it was such as we see every morning, namely, when the rising of the sun is approaching, but it does not yet appear on the lands, when the day indeed shines with the dim rays of the stars but does not yet glow fully until the sun rises. Hence, there could be no distinction of times then except only of day and night, and rightly it was said when the stars were made: "And let them be for signs and for seasons, and for days and years." For the changes of times began to be distinguished from when, on the fourth day of the nascent world, the sun, proceeding from the middle of the east, consecrated the vernal equinox with its rising, and by daily advances climbing to the heights of the sky, and again gradually descending from the solstitial peak to the lower parts, without delay reusing the equinoctial circles from the lower winter places, it completed the space of the year with the four well-known times and definite days. Also, the moon appearing full in the evening, set apart the times to be observed for the celebration of Easter on its first ascent. For that is the hour when not only the ancient people of God but also we today observe the first celebration of Easter, when, after the day of the equinox has passed, the full moon in the evening, that is, the fourteenth day, has appeared in the sky. For just after these things, when the Lord's day has come, the proper time for celebrating the Lord's resurrection will arrive, fulfilling to the letter also the word of the prophet who said: "He made the moon for seasons, the sun knows its setting" (Psalms 104:19). The stars also, apart from what we have mentioned above, because they either by their appearance indicate what the quality of the air will be or by their course show what watch of the night it is; they are for signs and seasons, because those coming into the sky designate summer times, those designate winter. They are also for days, because some accompany the sun in vernal days, others in autumnal. They are also for years, because those that for example now rise in the morning during the vernal equinox, come into the sky at the same equinox in the face of the sky every year; those that now rise in the evening or morning at the solstice, always rise at those times in the same hours. But there are also some stars which the astrologers call planets, that is, wandering stars, which make longer years by their orbit, returning to the same place in the sky. For the star called Saturn is said to return to the same places of the stars in which it was thirty years before, Jupiter in twelve years, Mars in two solar years completing its circuit in the sky, the moon, too, makes a year with twelve of its cycles, that is, of three hundred fifty-four days, and to make its cycle concord with the solar year, every second or third year it adds a thirteenth month, which calculators call the embolismiatic year, and it becomes a year of three hundred eighty-four days. — Commentary on Genesis (Hexaemeron) Bede : And God saw that it was good. Necessarily, the holy Scripture often finds that God saw that the things He made were good, so that the piety of the faithful might be informed by this; however, it is not for human understanding, which often is offended even by good things whose causes and order it does not know, to judge visible and invisible creation, but rather to believe and yield to the praising God. For the more religiously one has believed in God before knowing, the more easily they will understand something in progressing. Therefore, God saw that the things He made were good, because what pleased Him to be made so that they would be made, pleased Him when made to last, to the extent that the measure of existing or persisting was established for each thing by such a great Creator. — Commentary on Genesis (Hexaemeron)