St. Ambrose on the Creation of Man

St. Ambrose of Milan ca. 338-397

Nor is it a matter of indifference that the woman was not formed of the same clay from which Adam was made, but was made from the rib of Adam himself, so that we might know that the flesh of man and woman is of but one nature, and that there is but one source of the human race. Therefore at the beginning it is not two that are made, man and woman, nor two men, not two women, but first man is made, and then woman from him. For God willed to settle one nature upon mankind, and starting from the origin of this creature, He snatched away the possibility of numerous and disparate natures. (De Paradiso 10, 48)