At Genesis 1:2, continued Ambrose, "the earth was…covered…. Because water flowed over it…. Darkness was diffused over it, because there was not yet the light of day."
This proves Ambrose (whom Calvin endorsed) did not share the view which claims earth’s first day commenced at Genesis 1:1 rather than at 1:3-5. Held Ambrose: "The day [of Genesis 1:3f] is a division of time – not its beginning" (as in Genesis 1:1). For the first day began only after the darkness of Genesis 1:2 – namely with the advent of the "light" at Genesis 1:3-5.