And the earth was without form, and void; and darkness was upon the face of the deep. And the Spirit of God moved upon the face of the waters.
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Augustine of Hippo
AD 430
One who diligently considers what darkness is really finds only the absence of light. Thus it said, “darkness was over the abyss,” as if to say, “There was no light over the abyss.” Hence, this matter that is ordered and distinguished by the next work of God is called the invisible and unformed earth and the deep that is lacking light. This is what was above called heaven and earth, like the seed of heaven and earth.