And God said, Let the waters be gathered together— After the elements of light and air were appointed to their proper places, the next in density, the water, i.e.. the lower water, or that under the air, is separated, by the divine direction; and thus, at length, the earth, or dry land, emerges and appears. It is to be observed, that Moses introduces every mutation with the words God said; intimating, that the power and energy of the Divinity over-ruled and conducted each operation; and, however natural causes might work, was the primum mobile, or the first great Mover throughout the whole formation.
Unto one place— All the waters of the world have one general communication. The rivers and the fountains all return themselves into the sea; and all seas have either a visible or secret communication with each other. I have no doubt but the Caspian sea disgorges itself, by subterraneous passages, into the Euxine, or the Ocean, which may be considered as the grand reservoir (the ONE PLACE) of all the waters of the earth. This observation is confirmed by the name given Genesis 1:10 to this one place, this conflux, or great receptacle, of all the congregated waters, seas, or ocean. All the waters make, in this sense, but one ocean, as all the dry land makes but one earth. How all this was brought about, how the channels were hollowed, the rocks and mountains formed, &c. it is impossible for us to determine! Only this we know, that the Divine Power continued his interposition, and by his omnipotent energy, to which all things are easy, directed the whole!