And God said,
Let there be lights in the firmament of the heaven to divide the day from the night; and let them be for signs, and for seasons, and for days, and years:
All Commentaries on Genesis 1:14 Go To Genesis 1
Thomas Aquinas
AD 1274
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.
