And God made a firmament, and divided the waters that were under the firmament, from those that were above the firmament, and it was so.

“And let it divide between water and water: and it was so. And God made the firmament; and God divided between the water which was under the firmament, and the water above the firmament: and it was so. As the excessive volume of water bore along over the face of the earth, the earth was by reason thereof "invisible" and "formless." When the Lord of all designed to make the invisible visible, He fixed then a third part of the waters in the midst; and another third part He set by itself on high, raising it together with the firmament by His own power; and the remaining third He left beneath, for the use and benefit of men. Now at this point we have an asterisk. The words are found in the Hebrew, but do not occur in the Septuagint.”

“Before laying hold of the meaning of Scripture let us try to meet objections from other quarters. We are asked how, if the firmament is a spherical body, as it appears to the eye, its convex circumference can contain the water which flows and circulates in higher regions? What shall we answer? One thing only: because the interior of a body presents a perfect concavity it does not necessarily follow that its exterior surface is spherical and smoothly rounded. Look at the stone vaults of baths, and the structure of buildings of cave form; the dome, which forms the interior, does not prevent the roof from having ordinarily a flat surface. Let these unfortunate men cease, then, from tormenting us and themselves about the impossibility of our retaining water in the higher regions. Now we must say something about the nature of the firmament, and why it received the order to hold the middle place between the waters. Scripture constantly makes use of the word firmament to express extraordinary strength. The Lord my firmament and refuge. I have strengthened the pillars of it. Praise him in the firmament of his power. The heathen writers thus call a strong body one which is compact and full, to distinguish it from the mathematical body. A mathematical body is a body which exists only in the three dimensions, breadth, depth, and height. A firm body, on the contrary, adds resistance to the dimensions. It is the custom of Scripture to call firmament all that is strong and unyielding. It even uses the word to denote the condensation of the air: He, it says, who strengthens the thunder. Scripture means by the strengthening of the thunder, the strength and resistance of the wind, which, enclosed in the hollows of the clouds, produces the noise of thunder when it breaks through with violence. Here then, according to me, is a firm substance, capable of retaining the fluid and unstable element water; and as, according to the common acceptation, it appears that the firmament owes its origin to water, we must not believe that it resembles frozen water or any other matter produced by the filtration of water; as, for example, rock crystal, which is said to owe its metamorphosis to excessive congelation, or the transparent stone which forms in mines. This pellucid stone, if one finds it in its natural perfection, without cracks inside, or the least spot of corruption, almost rivals the air in clearness. We cannot compare the firmament to one of these substances. To hold such an opinion about celestial bodies would be childish and foolish; and although everything may be in everything, fire in earth, air in water, and of the other elements the one in the other; although none of those which come under our senses are pure and without mixture, either with the element which serves as a medium for it, or with that which is contrary to it; I, nevertheless, dare not affirm that the firmament was formed of one of these simple substances, or of a mixture of them, for I am taught by Scripture not to allow my imagination to wander too far afield. But do not let us forget to remark that, after these divine words let there be a firmament, it is not said and the firmament was made but, and God made the firmament, and divided the waters. Genesis 1:7 Hear, O you deaf! See, O you blind!— who, then, is deaf? He who does not hear this startling voice of the Holy Spirit. Who is blind? He who does not see such clear proofs of the Only begotten. Let there be a firmament. It is the voice of the primary and principal Cause. And God made the firmament. Here is a witness to the active and creative power of God.”

“ויעש אלהים את הרקיע AND GOD MADE THE EXPANSE — He put it in proper condition in its place: this is the meaning of “making” it. Similarly (Deuteronomy 21:12) ועשתה את צפרניה “And she shall let grow (literally, make) her nails”. מעל לרקיע ABOVE THE EXPANSE — It is not said here על הרקיע “upon the firmament״, but מעל “hanging from above”, because they (the waters) were suspended in space (Genesis Rabbah 4:3). Why is it not stated in reference to the work of the second day “that it was good”? Because the work associated with water was not completed until the third day — He only began it on the second — and anything that is not completed is not in a state of perfection and at its best (and so cannot be termed “good”). Therefore on the third day when He completed the work associated with water and another work was commenced and finished, the words כי טוב are repeated, once in reference to the completion of the work of the second day, and again in reference to the completion of the work of that day (Genesis Rabbah 4:10).”

““And He made” – there is distinction employing [the word] bein with lamed. like “between water and water” (bein mayim lamayim) Genesis 1:6, “between holy and profane” (bein kodesh l’chol) Ezekiel 44:23 and there is [distinction] with bein and bein, as here – “and He separate between bein the waters below the firmament and between bein etc.”, and there is [distinction] with both of them, like “between you and between your G-d” (beineichem l’vein e-loheichem). The meaning of “and it was so” is that it attached to what follows: “when that happened, He called the heavens…””

“AND G-D MADE THE FIRMAMENT. The word asi’yah (doing) always means adjusting something to its required proportion. AND IT WAS SO. On the first day, And there was light is written after And G-d said, ‘Let there be light,’ in order to explain that after the command of G-d, it [the light] came forth into actuality and was as He decreed it to be. But here, after the command, Let there be a firmament, it is written, And G-d made the firmament, and divided, etc.; why then has Scripture added here, And it was so? It is to tell us that it was to be ever so, for all times. But Rabbi Abraham ibn Ezra explained that the expression and it was so is attached to the verse which follows, meaning when it was so, G-d called the firmament Heaven. That is not correct. In Bereshith Rabbah the Rabbis have said: “And G-d made the firmament. This is one of the verses which Ben Zoma found difficult: And G-d made, etc. But was not [the world created] by command, as it is written, By word of the Eternal were the heavens made?” Now Ben Zoma’s difficulty was not only on account of the word vaya’as (And He made), since on the fourth, fifth, is not found; only vayibra (and He created). and sixth day, vaya’as is also written. Rather, his difficulty was, as I have said, that on the other days, immediately after G-d’s command, it is written, And it was so, indicating that it came into being immediately after the command, but here on the second day, after it says, And G-d said — vaya’as (And He made) is written! This was his question. Perhaps Ben Zoma had some secret interpretation which he did not want to reveal. This is the explanation of the cause of his difficulty.”

“"And G-d made the firmament" - and it was that when some of the elemental water was removed from under that part of the waters which became vaporous in nature, as it was when He said, "let the waters be gathered from beneath the heavens" Genesis 1:9, it was fit that the vaporous part would descend to that same place from which the that [non-vaporous portion of] waters was removed. But He made it such that that "firmament" that separates would have the power to stop and prevent the vaporous portion from descending - that's the "waters which are above the firmament", such that the transformed atmospheric portion would descend, while the vaporous would remain in its original place. Because of this, when the moist vapor reaches it [i.e., the firmament], it condenses and gives rise to rain, snow and hail. As they condense they descend, as it is said, "at the sound of His placing an abundance of water in the heavens" Jeremiah 10:13. - what it wanted by saying "heavens": the firmament which condenses the atmospheric part [of the waters], as it is said "And G-d called the firmament "heavens" Genesis 1:8. Now when the cloudy, excited vapor arrives there [at the firmament], it generates thunder and lightning, and it is said: "He lifts up clouds from the ends of the earth, thunder from the rain He makes" [continuation of verse quoted previously from Jeremiah]. Now, seeing as how some of the heavier watery element is above the lighter air, which from our perspectives is against their nature - this without doubt indicates the action of an volitional actor, intended such an outcome, as it is said, "the work of His hands shall the firmament declare" Psalms 19:2 "and it was so" - it remained thus against its nature.”

“And God made the firmament,.... By a word speaking, commanding it into being, producing it out of the chaos, and spreading it in that vast space between the heaven of heavens and our earth (z), And divided the waters which were under the firmament from the waters which were above the firmament; the lower part of it, the atmosphere above, which are the clouds full of water, from whence rain descends upon the earth; and which divided between them and those that were left on the earth, and so under it, not yet gathered into one place; as it now does between the clouds of heaven and the waters of the sea. Though Mr. Gregory (a) is of opinion, that an abyss of waters above the most supreme orb is here meant; or a great deep between the heavens and the heaven of heavens, where, as in storehouses, the depth is laid up; and God has his treasures of snow, hail, and rain, and from whence he brought out the waters which drowned the world at the universal deluge. Others suppose the waters above to be the crystalline heaven, which for its clearness resembles water; and which Milton (b) calls the "crystalline ocean", And it was so: the firmament was accordingly made, and answered this purpose, to divide the waters below it from those above it; or "it was firm" (c), stable and durable; and so it has continued. (z) ------and God made The firmament, expanse of liquid, pure, Transparent, elemental air, diffused In circuit to the uttermost convex Of this great round.------ Milton, Paradise Lost, B. 7. l. 263, &c. (a) Notes and Observations, &c. c. 23. p. 110, &c. (b) Ibid. l. 291. (c) "et factum est firmum", Fagius & Nachmanides in ib.”