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to be species thereof. For this reason, therefore, he makes no mention of them.
QUESTION 70
ON THE WORK OF ADORNMENT, AS REGARDS THE FOURTH DAY (In Three Articles)
We must next consider the work of adornment, first as to each day by itself, secondly as to all seven days in general.
In the first place, then, we consider the work of the fourth day, secondly, that of the fifth day, thirdly, that of the sixth day, and fourthly, such matters as belong to the seventh day.
Under the first head there are three points of inquiry:
(1) As to the production of the lights;
(2) As to the end of their production;
(3) Whether they are living beings?
FIRST ARTICLE [I, Q. 70, Art. 1]
Whether the Lights Ought to Have Been Produced on the Fourth Day?
Objection 1: It would seem that the lights ought not to have been produced on the fourth day. For the heavenly luminaries are by nature incorruptible bodies: wherefore their matter cannot exist without their form. But as their matter was produced in the work of creation, before there was any day, so therefore were their forms. It follows, then, that the lights were not produced on the fourth day.
Obj. 2: Further, the luminaries are, as it were, vessels of light. But light was made on the first day. The luminaries, therefore, should have been made on the first day, not on the fourth.
Obj. 3: Further, the lights are fixed in the firmament, as plants are fixed in the earth. For, the Scripture says: "He set them in the firmament." But plants are described as produced when the earth, to which they are attached, received its form. The lights, therefore, should have