Such are the notions which men put forward. But the impiety of their foolish talk is plainly declared by the divine teaching of the Christian faith. From it we know that, because there is Mind behind the universe, it did not originate itself; because God is infinite, not finite, it was not made from pre-existent matter, but out of nothing and out of non-existence absolute and utter God brought it into being through the Word. He says as much in Genesis: "In the beginning God created the heavens and the earth; and again through that most helpful book The Shepherd, [of Hermas] "Believe thou first and foremost that there is One God Who created and arranged all things and brought them out of non-existence into being." Paul also indicates the same thing when he says, "By faith we understand that the worlds were framed by the Word of God, so that the things which we see now did not come into being out of things which had previously appeared." For God is good--or rather, of all goodness He is Fountainhead, and it is impossible for one who is good to be mean or grudging about anything. Grudging existence to none therefore, He made all things out of nothing through His own Word, our Lord Jesus Christ and of all these His earthly creatures He reserved especial mercy for the race of men.
St. Athanasius, On the Incarnation