Genesis 1:6

And God said, Let there be a firmament - Our translators, by following the firmamentum of the Vulgate, which is a translation of the στερεωμα of the Septuagint, have deprived this passage of all sense and meaning. The Hebrew word רקיע rakia, from רקע raka, to spread out as the curtains of a tent or pavilion, simply signifies an expanse or space, and consequently that circumambient space or expansion separating the clouds, which are in the higher regions of it, from the seas, etc., which are below it. This we call the atmosphere, the orb of atoms or inconceivably small particles; but the word appears to have been used by Moses in a more extensive sense, and to include the whole of the planetary vortex, or the space which is occupied by the whole solar system.

- IV. The Second Day

6. רקיע rāqı̂ya‛, "expanse;" στερέωμα stereōma, רקע rāqa‛, "spread out by beating, as leaf gold." This expanse was not understood to be solid, as the fowl is said to fly on the face of it Genesis 1:21. It is also described as luminous Daniel 12:3, and as a monument of divine power Psalm 150:1.

7. עשׂה ‛āśâh "work on," "make out of already existing materials."

The second act of creative power bears upon the deep of waters, over which the darkness had prevailed, and by which the solid crust was still overlaid. This mass of turbid and noisy water must be reduced to order, and confined within certain limits, before the land can be reached. According to the laws of material nature, light or heat must be an essential factor in all physical changes, especially in the production of gases and vapors. Hence, its presence and activity are the first thing required in instituting a new process of nature. Air naturally takes the next place, as it is equally essential to the maintenance of vegetable and animal life. Hence, its adjustment is the second step in this latest effort of creation.

Genesis 1:6

Let there be an expanse in the midst of the water. - For this purpose God now calls into existence the expanse. This is that interval of space between the earth on the one side and the birds on the wing, the clouds and the heavenly bodies on the other, the lower part of which we know to be occupied by the air. This will appear more clearly from a comparison of other passages in this chapter (Genesis 1:14, Genesis 1:20).

And let it be dividing between water and water. - It appears that the water in a liquid state was in contact with another mass of water, in the shape of dense fogs and vapors; not merely overhanging, but actually resting on the waters beneath. The object of the expanse is to divide the waters which are under it from those which are above it. Hence, it appears that the thing really done is, not to create the space that extends indefinitely above our heads (which, being in itself no thing, but only room for things, requires no creating), but to establish in it the intended disposition of the waters in two separate masses, the one above, and the other below the intervening expanse. This we know is effected by means of the atmosphere, which receives a large body of water in the state of vapor, and bears up a visible portion of it in the form of clouds. These ever-returning and ever-varying piles of mist strike the eye of the unsophisticated spectator; and when the dew is observed on the grass, or the showers of rain, hail, and snow are seen falling on the ground, the conclusion is obvious - that above the expanse, be the distance small or great, is laid up an unseen and inexhaustible treasury of water, by which the earth may be perpetually bedewed and irrigated.

The aqueous vapor is itself, as well as the element with which it is mingled, invisible and impalpable; but when condensed by cold it becomes apparent to the eye in the form of mists and clouds, and, at a certain point of coolness, begins to deposit itself in the palpable form of dew, rain, hail, or snow. As soon as it becomes obvious to the sense it receives distinguishing names, according to its varying forms. But the air being invisible, is unnoticed by the primitive observer until it is put in motion, when it receives the name of wind. The space it occupies is merely denominated the expanse; that is, the interval between us and the various bodies that float above and hang upon nothing, or nothing perceptible to the eye.

The state of things before this creative movement may be called one of disturbance and disorder, in comparison with the present condition of the atmosphere. This disturbance in the relations of air and water was so great that it could not be reduced to the present order without a supernatural cause. Whether any other gases, noxious or innocuous, entered into the constitution of the previous atmosphere, or whether any other ingredients were once held in solution by the watery deep, we are not informed. Whether any volcanic or plutonic violence had disturbed the scene, and raised a dense mass of gaseous damp and fuliginous matter into the airy region, is not stated. How far the disorder extended we cannot tell. We are merely certain that it reached over all the land known to man during the interval between this creation and the deluge. Whether this disorder was temporary or of long standing, and whether the change was effected by altering the axis of the earth's rotation, and thereby the climate of the land of primeval man, or by a less extensive movement confined to the region under consideration, are questions on which we receive no instruction, because the solution does not concern our well-being. As soon as human welfare comes to be in any way connected with such knowledge, it will by some means be made attainable.

The introduction of the expanse produced a vast change for the better on the surface of the earth. The heavy mass of murky damp and aqueous steam commingling with the abyss of waters beneath is cleared away. The fogs are lifted up to the higher regions of the sky, or attenuated into an invisible vapor. A leaden mass of clouds still overshadows the heavens. But a breathing space of pure pellucid air now intervenes between the upper and lower waters, enveloping the surface of the earth, and suited for the respiration of the flora and fauna of a new world.

Let it be noted that the word "be" is here again employed to denote the commencement of a new adjustment of the atmosphere. This, accordingly, does not imply the absolute creation on the second day of our present atmosphere: it merely indicates the constitution of it out of the materials already at hand, - the selecting and due apportionment of the proper elements; the relegation of all now foreign elements to their own places; the dissipation of the lazy, deadening damps, and the establishment of a clear and pure air fit for the use of the future man. Any or all of these alterations will satisfy the form of expression here adopted.

1:6-8 We have here an account of the second day's work, the creation of the firmament. In which observe, 1. The command of God; Let there be a firmament - An expansion; so the Hebrew word signifies, like a sheet spread, or a curtain drawn out. This includes all that is visible above the earth, between it and the third heavens, the air, its higher, middle, and lower region, the celestial globe, and all the orbs of light above; it reaches as high as the place where the stars are fixed, for that is called here the firmament of heaven, Genesis 1:14,15, and as low as the place where the birds fly for that also is called the firmament of heaven, Genesis 1:20. 2. The creation of it: and God made the firmament. 3. The design of it; to divide the waters from the waters-That is, to distinguish between the waters that are wrapt up in the clouds, and those that cover the sea; the waters in the air, and those in the earth. 4. The naming it; He called the firmament Heaven - 'Tis the visible heaven, the pavement of the holy city. The height of the heavens should mind us of God's supremacy, and the infinite distance that is between us and him; the brightness of the heavens, and their purity, should mind us of his majesty, and perfect holiness; the vastness of the heavens, and their encompassing the earth, and influence upon it, should mind us of his immensity and universal providence.