This article is the second in a seven-part series exploring the Genesis 1 creation account. Examining the text through a historical-critical lens, this series unpacks the original Hebrew, the impact of ancient translations, and the profound theological meaning of each day of creation.

In the ancient Near East, the structure of the universe was understood very differently than it is today. To read Genesis 1 accurately, one must mentally step back into a world before telescopes and satellite imagery. When the ancient Israelites looked up at the blue sky and felt the rain falling from it, they logically concluded that a massive, cosmic ocean was suspended above their heads.

On Day One, the biblical author described God conquering the chaotic, timeless void by establishing the rhythm of Time. On Day Two, the focus shifts to the physical architecture of the universe. God must carve out a safe, breathable space within the watery abyss.

The Hebrew Text: Separating the Waters

The text for the second day reads: “And God said, ‘Let there be a vault in the midst of the waters, and let it separate the waters from the waters.'” To modern readers, this command can seem bizarre. Why are there waters that need separating?

As established in the first article, Genesis does not begin with an empty vacuum; it begins with tohu wa-bohu (formless void) and the deep (tehom). The universe is entirely submerged in primeval, chaotic water. For biological life to exist, God cannot simply place it into this cosmic ocean—it would drown. Therefore, Day Two is entirely about pushing the primeval waters apart to create a habitable bubble. God creates a barrier to hold the upper waters at bay, leaving the space below open for the future creation of the atmosphere, land, and life.

The Hard Word: Raqia

The Hebrew word used for this cosmic barrier is raqia (often translated as “vault,” “dome,” or “firmament”).

Linguistically, raqia derives from a verb meaning to beat, stamp, or hammer out. In the ancient world, this verb was typically used to describe the work of a metal-smith hammering bronze or gold into thin, broad plates. Therefore, the biblical author envisions the raqia not as a soft layer of invisible gas, but as a solid, beaten-metal dome resting over the earth, strong enough to support the immense weight of the heavenly ocean above. (When the “windows of heaven” are later opened in the Noahic flood narrative, it is these upper waters crashing back down through the raqia).

The Translation Legacy

The concept of a solid cosmic dome was deeply entrenched in ancient thought, and it permanently influenced the history of Western theology through translation.

When Jewish scribes in Alexandria translated the Hebrew scriptures into Greek in the 3rd century BCE (the Septuagint), they needed a Greek equivalent for raqia. They chose the word stereoma, which explicitly means a solid, firm structure or foundation.

Centuries later, when the Bible was translated into Latin (the Vulgate), the translator Jerome used the Latin word firmamentum—meaning a physical support or prop. When English Bibles like the King James Version were printed, they simply anglicized the Latin, giving us the famous phrase, “Let there be a firmament.” These linguistic choices locked the ancient cosmological model into Western religious vocabulary for millennia.

The Meaning of Day Two

From a historical-critical perspective, the author of Genesis is not attempting to write an atmospheric science textbook. If Day One established Time, Day Two establishes Weather and Space.

What is most remarkable about Day Two is its absolute lack of mythological drama. In the creation myths of surrounding cultures, the cosmic waters were often personified as chaotic, destructive deities. In the Babylonian epic Enuma Elish, the creator god Marduk has to violently slaughter the saltwater dragon Tiamat, splitting her corpse in half to create the sky and the earth.

In Genesis, there is no battle. The chaotic waters are not a rival god; they are just inanimate material. The supreme God simply speaks, and the waters obediently recede to their assigned boundaries. God effortlessly carves out a safe biosphere, preparing the canvas for the sudden emergence of land and life.

This concludes Part 2 of our series. By carving out the sky, God has established the domain of Space. In Part 3, we will explore Day Three, where the waters below are gathered together, and the dry land finally emerges from the deep.