air over water, ḥoshek (fire), which is "upon the face of the deep," is undoubtedly above air. It was here necessary to use the term ruaḥ elohim, because air is described here as in motion (meraḥefet), and the motion of the air is, as a rule, ascribed to God; comp. "And there went forth a wind from the Lord" (Num. xi. 31); "Thou didst blow with thy wind" (Exod. xv. 10); "And the Lord turned a mighty strong west wind" (ibid. x. 19), and the like. As the first ḥoshek, which denotes the element fire, is different from the ḥoshek mentioned further on in the sense of "darkness," the latter is explained and distinguished from the former, according to our explanation, in the words, "And darkness he called Night." This is now clear.
The phrase, "And he divided between the waters," etc., does not describe a division in space, as if the one part were merely above the other, whilst the nature of both remained the same, but a distinction as regards their nature or form. One portion of that which was first called water was made one thing by certain properties it received, and another portion received a different form, and this latter portion is that which is commonly called water and of this it is said, "And the gathering of the waters he called Seas." Scripture even indicates that the first mayim ("water") in the phrase, "On the face of the waters," does not refer to the waters which form the seas and that part of the element "water," having received a particular form, and being above the air, is distinguished from the other part which has received the form of ordinary water. For the words, "And he divided between the waters which are beneath the firmament and the waters which are above the firmament are similar in meaning to the phrase, "And God divided between the light and the darkness," and refer to a distinction by a separate form. The firmament itself was formed of water; and in the words of our Sages (Bereshit Rabba; cap. iv.), "The middle drop congealed and formed the heavens."
Here likewise Scripture says, in accordance with what I said above, "And God called the firmament Heaven" (Gen. i. 8), in order to explain the homonymity of the term shamayim (heaven), and to show that shamayim in the first verse is not the firmament which is also called shamayim (heaven). The difference is more clearly expressed in the words, "In the open firmament of heaven" (ibid. i. 20); here it is shown that "firmament" (raki‘a) and "heaven" (shamayim), are two different things. In consequence of this homonymity of the term shamayim the term raki‘a (firmament) is also used of the true heaven, just as the real firmament is sometimes called shamayim (heaven); comp. "And God set them in the raki‘a (firmament) of the heaven" (ibid. i. 17).
This verse shows clearly that the stars, the sun, and the moon are not, as people believe, on the surface of the spheres, but they are fixed in the spheres, and this has been proved satisfactorily, there being no vacuum in the Universe: for it is said, "in the firmament of the heaven," and not "upon the firmament of the heaven."
It is therefore clear that there has been one common element called water, which has been afterwards distinguished by three different forms; one part forms the seas, another the firmament, and a third part is over the firmament, and all this is separate from the earth. The Scriptural text follows here a peculiar
